No output parameter evaluation using function and CustomObject

Hello,

I have a function which checks for certain event id by accepting 2 parameter values, i.e; ServerName and BackupType. For some reason I am unable to get any output for the function.

Function Check-CMBackup
{

[CmdletBinding()]
  Param(
    [Parameter(Mandatory=$True, HelpMessage="SCCM Server Name", ValueFromPipeline=$True, ValueFromPipelineByPropertyName=$true)]
    [ValidateNotNullorEmpty()]
    [string]$ServerName,
    [Parameter(Mandatory=$True, HelpMessage="SCCM BackupType", ValueFromPipeline=$True,ValueFromPipelineByPropertyName=$true)]
    [ValidateNotNullorEmpty()]
    [ValidateSet('Site','DB','Both')]
    [string]$BackupType
    )

    BEGIN
    {
     $a = Get-Date
     $b = $a.AddDays(-1)
     $b = $b.ToShortDateString();
     $c = Get-Date
     $c = $c.ToShortDateString();
     $StartTime = "10:00:00 PM"
     $EndTime = "06:00:00 AM"
     $before = $c + " " + $EndTime
     $after = $b + " " + $StartTime
     $before = [datetime]$before
     $after = [datetime]$after


     $props = [ordered]@{
     ServerName = $ServerName
     SiteBackup = $null
     DBBackup =$null
     Date = Get-Date -Format "yyyy-MM-dd";
     Time = Get-Date -Format "HH:mm:ss";
     } 
    }

    PROCESS
    {
        if(Test-Connection -ComputerName $ServerName -BufferSize 2 -Count 3)
        {
            if($BackupType -eq 'Site')
            {   
                Try
                {
                    if($sbkp = Get-EventLog -ComputerName $SiteServer -LogName Application -EntryType Information -after $after -before $before -Source "SMS Server"|?{$_.EventID -eq 6833})
                    {
                        $props.SiteBackup = "Success"
                    }
                    else
                    {
                        $props.SiteBackup = "Failed"
                    }
                  New-Object -TypeName PSObject -Property $props
                }
                Catch
                {
                    $props.SiteBackup = "Error"
                }
            }
        if($BackupType -eq 'DB')
        {
            Try
            {         
                if($sbkp = Get-EventLog -ComputerName $DBServer -LogName Application -EntryType Information -after $after -before $before -Source "SMS Server"|?{$_.EventID -eq 18264})
                {
                    $props.DBBackup = "Success"
                }
                else
                {
                    $props.DBBackup = "Failed"
                }
                New-Object -TypeName PSObject -Property $props 
            }
            Catch
            {
                $props.DBBackup = "Error"
            }
        }

        if($BackupType -eq 'Both')
        {
            Try
            {
                if($sbkp = Get-EventLog -ComputerName $SiteServer -LogName Application -EntryType Information -after $after -before $before -Source "SMS Server"|?{$_.EventID -eq 6833})
                {
                    $props.SiteBackup = "Success"
                }
                else
                {
                    $props.SiteBackup = "Failed"
                }         
                if($sbkp = Get-EventLog -ComputerName $DBServer -LogName Application -EntryType Information -after $after -before $before -Source "SMS Server"|?{$_.EventID -eq 18264})
                {
                    $props.DBBackup = "Success"
                }
                else
                {
                    $props.DBBackup = "Failed"
                }
                New-Object -TypeName PSObject -Property $props 
            }
            Catch
            {
                $props.DBBackup = "Error"
            }
        }
    }
    else
    {
        $props.SiteBackup = "Offline"
        $props.DBBackup = "Offline"
    }     
  }
}