File Error 2 Names

Setting: http://kingsunitedway.org/PDF/Unknown Errors.htm
Two machines XP Pro, peer to peer, sharing and access are good for everything, except.

Machine #1 has the program dir, application runs fine.
Machine #2 has a mapped drive to the program dir, the errors below occur.
The application was running from #2.
When I copy the program dir to machine #2 it runs fine on #2 and will run on #1 from #2.

Errors:
Security box with exclamation triangle, “File Error 2 Names: Access Denied”, OK button.
Click OK button, next Box: File Access Error (f:\filename\!ope) could not be opened.
Error: Access Denied (5). OK button.

Click OK button, next Box: Halt , red circle white x, “Disk Error”,

I can not find any explainations form anywhere,,, any thoughts!!!!!!!

thead