Why does Get-ADObject not work in this script?

Ok, I've created a form using primalforms (something blogged about on the scripting guys last year) so a coworker will stop complaining that my search and restore deleted accounts script is command line (even though I created it as a menu and made it as simple for him as possible). The problem is, the Search function complains that it doesn't like Get-ADObject or -Filter. the code is rather long (primalforms standard) but is listed below.

#Generated Form Function
function GenerateForm {
########################################################################
# Code Generated By: SAPIEN Technologies PrimalForms (Community Edition) v1.0.10.0
# Generated On: 2/3/2014 3:33 PM
# Generated By: gdavies
########################################################################

#region Import the Assemblies
[reflection.assembly]::loadwithpartialname("System.Drawing") | Out-Null
[reflection.assembly]::loadwithpartialname("System.Windows.Forms") | Out-Null
#endregion

#region Generated Form Objects
$ADSearchandRestore = New-Object System.Windows.Forms.Form
$Results = New-Object System.Windows.Forms.TextBox
$groupBox1 = New-Object System.Windows.Forms.GroupBox
$Resultslabel = New-Object System.Windows.Forms.Label
$Instructions = New-Object System.Windows.Forms.Label
$Input = New-Object System.Windows.Forms.TextBox
$Exit = New-Object System.Windows.Forms.Button
$Restore = New-Object System.Windows.Forms.Button
$Search = New-Object System.Windows.Forms.Button
$InitialFormWindowState = New-Object System.Windows.Forms.FormWindowState
#endregion Generated Form Objects

#----------------------------------------------
#Generated Event Script Blocks
#----------------------------------------------
#Provide Custom Code for events specified in PrimalForms.
$Restore_OnClick= 
{
#TODO: Place custom script here

}

$Exit_OnClick= 
{$ADSearchandRestore.Close()}

$loadmodule= 
{import-module activedirectory
set-location ad:}

$handler_label2_Click= 
{
#TODO: Place custom script here

}

$Search_OnClick={
     $results.Text=Get-ADObject -Filter "displayName -eq '$($input.text)'" -IncludeDeletedObjects | Out-String
     $Results.Focus()
}

$OnLoadForm_StateCorrection=
{#Correct the initial state of the form to prevent the .Net maximized form issue
	$ADSearchandRestore.WindowState = $InitialFormWindowState
}


#----------------------------------------------
#region Generated Form Code
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 249
$System_Drawing_Size.Width = 289
$ADSearchandRestore.ClientSize = $System_Drawing_Size
$ADSearchandRestore.DataBindings.DefaultDataSourceUpdateMode = 0
$ADSearchandRestore.Name = "ADSearchandRestore"
$ADSearchandRestore.Text = "AD Search & Restore"
$ADSearchandRestore.add_Load($loadmodule)

$Results.DataBindings.DefaultDataSourceUpdateMode = 0
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 12
$System_Drawing_Point.Y = 145
$Results.Location = $System_Drawing_Point
$Results.Name = "Results"
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 20
$System_Drawing_Size.Width = 264
$Results.Size = $System_Drawing_Size
$Results.TabIndex = 8
$Results.add_TextChanged($handler_textBox2_TextChanged)

$ADSearchandRestore.Controls.Add($Results)


$groupBox1.DataBindings.DefaultDataSourceUpdateMode = 0
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 12
$System_Drawing_Point.Y = 116
$groupBox1.Location = $System_Drawing_Point
$groupBox1.Name = "groupBox1"
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 5
$System_Drawing_Size.Width = 264
$groupBox1.Size = $System_Drawing_Size
$groupBox1.TabIndex = 7
$groupBox1.TabStop = $False

$ADSearchandRestore.Controls.Add($groupBox1)

$Resultslabel.DataBindings.DefaultDataSourceUpdateMode = 0

$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 11
$System_Drawing_Point.Y = 132
$Resultslabel.Location = $System_Drawing_Point
$Resultslabel.Name = "Resultslabel"
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 23
$System_Drawing_Size.Width = 265
$Resultslabel.Size = $System_Drawing_Size
$Resultslabel.TabIndex = 6
$Resultslabel.Text = "Results"
$Resultslabel.add_Click($handler_label2_Click)

$ADSearchandRestore.Controls.Add($Resultslabel)

$Instructions.DataBindings.DefaultDataSourceUpdateMode = 0
$Instructions.Font = New-Object System.Drawing.Font("Microsoft Sans Serif",9,0,3,0)

$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 12
$System_Drawing_Point.Y = 9
$Instructions.Location = $System_Drawing_Point
$Instructions.Name = "Instructions"
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 49
$System_Drawing_Size.Width = 265
$Instructions.Size = $System_Drawing_Size
$Instructions.TabIndex = 4
$Instructions.Text = "Enter the full Display Name you wish to search for/restore in the box below"
$Instructions.TextAlign = 32

$ADSearchandRestore.Controls.Add($Instructions)

$Input.DataBindings.DefaultDataSourceUpdateMode = 0
$Input.Font = New-Object System.Drawing.Font("Microsoft Sans Serif",8.25,0,3,0)
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 12
$System_Drawing_Point.Y = 61
$Input.Location = $System_Drawing_Point
$Input.Name = "Input"
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 20
$System_Drawing_Size.Width = 265
$Input.Size = $System_Drawing_Size
$Input.TabIndex = 3

$ADSearchandRestore.Controls.Add($Input)


$Exit.DataBindings.DefaultDataSourceUpdateMode = 0
$Exit.FlatStyle = 1
$Exit.Font = New-Object System.Drawing.Font("Microsoft Sans Serif",8.25,1,3,0)

$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 202
$System_Drawing_Point.Y = 87
$Exit.Location = $System_Drawing_Point
$Exit.Name = "Exit"
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 23
$System_Drawing_Size.Width = 75
$Exit.Size = $System_Drawing_Size
$Exit.TabIndex = 2
$Exit.Text = "Exit"
$Exit.UseVisualStyleBackColor = $True
$Exit.add_Click($Exit_OnClick)

$ADSearchandRestore.Controls.Add($Exit)

$Restore.BackColor = [System.Drawing.Color]::FromArgb(255,255,0,0)

$Restore.DataBindings.DefaultDataSourceUpdateMode = 0
$Restore.FlatStyle = 1
$Restore.Font = New-Object System.Drawing.Font("Microsoft Sans Serif",8.25,1,3,0)
$Restore.ForeColor = [System.Drawing.Color]::FromArgb(255,0,0,0)

$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 108
$System_Drawing_Point.Y = 87
$Restore.Location = $System_Drawing_Point
$Restore.Name = "Restore"
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 23
$System_Drawing_Size.Width = 75
$Restore.Size = $System_Drawing_Size
$Restore.TabIndex = 1
$Restore.Text = "Restore"
$Restore.UseVisualStyleBackColor = $False
$Restore.add_Click($Restore_OnClick)

$ADSearchandRestore.Controls.Add($Restore)

$Search.BackColor = [System.Drawing.Color]::FromArgb(255,144,238,144)

$Search.DataBindings.DefaultDataSourceUpdateMode = 0
$Search.FlatStyle = 1
$Search.Font = New-Object System.Drawing.Font("Microsoft Sans Serif",8.25,1,3,0)

$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 12
$System_Drawing_Point.Y = 87
$Search.Location = $System_Drawing_Point
$Search.Name = "Search"
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 23
$System_Drawing_Size.Width = 75
$Search.Size = $System_Drawing_Size
$Search.TabIndex = 0
$Search.Text = "Search"
$Search.UseVisualStyleBackColor = $False
$Search.add_Click($Search_OnClick)

$ADSearchandRestore.Controls.Add($Search)

#endregion Generated Form Code

#Save the initial state of the form
$InitialFormWindowState = $ADSearchandRestore.WindowState
#Init the OnLoad event to correct the initial state of the form
$ADSearchandRestore.add_Load($OnLoadForm_StateCorrection)
#Show the Form
$ADSearchandRestore.ShowDialog()| Out-Null

} #End Function

#Call the Function
GenerateForm

The code associated with the Search button is in lines 50 to 53PS

This opens the form, and the Exit button works (yay), but entering a display name and hitting search gives the error belowD:\> \zzUntitled14.ps1

Can anyone tell me what is wrong here?

for info, $input.text is the text box entry on the form, the user types in the name they want to search for here. $results.text is the output, so it should display the results of the search here.

The form looks like this

I have, as yet, not tried to add any code for the restore button, I want to get the search working first.