AutoSave Filename and Directory

***NOTE:  I accidentally posted this in Root.  Feel free to delete that thread***

I am attempting to use PDFCreator's AutoSave mode in a larger application using the COM interface from C#/.NET.  Some of the time, PDFCreator doesn't respect the options I give it regarding AutoSave filename and directory; the file ends up in my Documents library, with a date/time filename (ie, "20130705070827.pdf").

Do you have any advice for forcing PDFCreator to honor the Autosave Directory and Filename?  

Windows 8, PDFCreator v1.7.0

Relavent code:

String parameters = "/NoProcessingAtStartup";
if ( !_PDFCreator.cStart( parameters, false ) )
    return false;

_PDFCreator.set_cOption("UseAutosaveDirectory", 1);
_PDFCreator.set_cOption("AutosaveDirectory", Path.GetDirectoryName(sFullPath));
_PDFCreator.set_cOption("AutosaveFilename", Path.GetFileNameWithoutExtension(sFullPath));
_PDFCreator.set_cOption("AutosaveFormat", 0);
_PDFCreator.set_cOption("AutosaveStartStandardProgram", 0);
_PDFCreator.set_cOption("UseAutosave", 1);
_PDFCreator.cPrinterStop = false;
   
System.Drawing.Printing.PrintDocument pd = OtherComponent.GetPrintDocument();
pd.PrinterSettings.PrinterName = "PDFCreator";
pd.Print();