InfoPath Dev

I have infopath forms publised to Sharepoint.  We upgraded Sharepoint from MOSS2K7 to MOSS2K10.

 I re-published all the form libraries to point to the new url.  All my infopath from libraries work except one.  When I open existing forms and try to "submit" back to the same library, I get the following message:  (note, they open fine.  They just don't submit back)

 Infopath cannot submit the form

An error occurred while the form was being sumbitted

the form cannot be submitted to the following location:  http://gateway/...

The filename, directory name, or volume label syntax is incorrect.

Any suggestions...please.

You want to try  deleting server cache registry key (HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Common\Internet\Server Cache) and let it regenerate. BUT before you do, save it first!