Need help using new-webserviceproxy

I am trying to follow the example in this article, http://technet.microsoft.com/en-us/library/hh849841.aspx

Here is what I'm getting, any idea what the issue is? I've tried this from a few different environments with the same results.

PS C:\> $zip = New-WebServiceProxy -uri http://www.webservicex.net/uszip.asmx?WSDL

PS C:\> $zip

SoapVersion                          : Default
AllowAutoRedirect                    : False
CookieContainer                      :
ClientCertificates                   : {}
EnableDecompression                  : False
UserAgent                            : Mozilla/4.0 (compatible; MSIE 6.0; MS Web Services Client
                                       Protocol 4.0.30319.34003)
Proxy                                :
UnsafeAuthenticatedConnectionSharing : False
Credentials                          :
UseDefaultCredentials                : False
ConnectionGroupName                  :
PreAuthenticate                      : False
Url                                  :http://www.webservicex.net/uszip.asmx
RequestEncoding                      :
Timeout                              : 100000
Site                                 :
Container                            :

PS C:\> $zip.GetInfoByZIP(98272)
Exception calling "GetInfoByZIP" with "1" argument(s):
"System.Web.Services.Protocols.SoapException: Server was unable to process request. --->
System.IO.IOException: There is not enough space on the disk.
   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.FileStream.WriteCore(Byte[] buffer, Int32 offset, Int32 count)
   at System.IO.FileStream.FlushWrite(Boolean calledFromFinalizer)
   at System.IO.FileStream.Dispose(Boolean disposing)
   at System.IO.Stream.Close()
   at System.IO.StreamWriter.Dispose(Boolean disposing)
   at System.IO.TextWriter.Dispose()
   at Microsoft.CSharp.CSharpCodeGenerator.FromSourceBatch(CompilerParameters options, String[]
sources)
   at Microsoft.CSharp.CSharpCodeGenerator.System.CodeDom.Compiler.ICodeCompiler.CompileAssemblyF
romSourceBatch(CompilerParameters options, String[] sources)
   at System.CodeDom.Compiler.CodeDomProvider.CompileAssemblyFromSource(CompilerParameters
options, String[] sources)
   at System.Xml.Serialization.Compiler.Compile(Assembly parent, String ns,
XmlSerializerCompilerParameters xmlParameters, Evidence evidence)
   at System.Xml.Serialization.TempAssembly.GenerateAssembly(XmlMapping[] xmlMappings, Type[]
types, String defaultNamespace, Evidence evidence, XmlSerializerCompilerParameters parameters,
Assembly assembly, Hashtable assemblies)
   at System.Xml.Serialization.TempAssembly..ctor(XmlMapping[] xmlMappings, Type[] types, String
defaultNamespace, String location, Evidence evidence)
   at System.Xml.Serialization.XmlSerializer.FromMappings(XmlMapping[] mappings, Type type)
   at System.Web.Services.Protocols.SoapServerType..ctor(Type type, WebServiceProtocols
protocolsSupported)
   at System.Web.Services.Protocols.SoapServerProtocol.Initialize()
   at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context,
HttpRequest request, HttpResponse response, Boolean& abortProcessing)
   --- End of inner exception stack trace ---"
At line:1 char:1
+ $zip.GetInfoByZIP(98272)
+ ~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : SoapException

PS C:\>