Running PDFForge as a service in Server 2008 x64

I'm having a problem running PDFForge as a service in Server 2008 x64.  I have the service installed using sc create PDFForge binPath= <path to srvany> and of course editing the registry appropriately.

While the service starts, I can see PDFForge.exe*32 in the Task Manager, it doesn't actually print anything (the Temp directory has a bunch of documents spooled).  If I log in and manually run PDFForge, all of those documents print.