Reporting Services Corrupted PDF Files

Hi,
I use the command line program rs.exe to create some exports in pdf format from a Reporting Services Server 2005. I sometimes have problems to open the export of one specific report. Acrobat Reader shows error 109, file corruption.
I used the option -l 0 to ensure that no timeout occurs.
I used the option -e mgmt2000 because I could not find the syntax for the new namespace in SSRS 2005.
The other reports use the completely same settings and everythings works perfectly.

This is the batch:
rs -i D:SSRSScripts
un_MyReport.rss -s http://myserver/reportserver -l 0 -e mgmt2000 -t -b

And this is the input file (run_MyReport.rss):
' Export report to pdf format to the specified path under filePath and to the file which is specified under fileN
Dim format as string = "PDF"
Dim filePath as String = "D:exportsReports2Send"
Dim fileN as String = "MyReport"
'Dim Datum as String = CString(Date)
Dim fileName as String = filePath + fileN + ".pdf"
Dim reportPath as String = "/MyFolder/MyReport"

Public Sub Main()

' Prepare Render arguments
Dim historyID as string = Nothing
Dim deviceInfo as string = Nothing
Dim showHide as string = Nothing
Dim results() as Byte
Dim encoding as string
Dim mimeType as string = "application/pdf"
Dim warnings() AS Warning = Nothing
Dim reportHistoryParameters() As ParameterValue = Nothing
Dim streamIDs() as string = Nothing
'Windows Credentials were send to Reporting server service
rs.Credentials = System.Net.CredentialCache.DefaultCredentials


' Report Parameters
Dim parameters(0) As ParameterValue

results = rs.Render(reportPath, format, _
Nothing, Nothing, Nothing, _
Nothing, Nothing, encoding, mimeType, _
reportHistoryParameters, warnings, streamIDs)

' Open a file stream and write out the report
Dim stream As FileStream = File.OpenWrite(fileName)
stream.Write(results, 0, results.Length)
stream.Close()

End Sub

'End of script


Did anyone experience similar problems?

Best regards,
Stefoon