Fortinbra 37 Posting Whiz in Training

I need a way to get files from a server shared directory uploaded to a second server, but the user got to pick the files from their local PC and needed to see a progress bar.
I decided to attempt this in SilverLight, however, my week of coding and modifying have appeared to be for not. When running localy against IIS, it works just fine, with no problems. When pushing out to a production server, I get an error FileSecurityState_OperationNotPermitted .

Does anyone know why it would work locally but not production?