Networking Issue

[Keyser Soze]

I've got this application here at work that pushes out a file to another machine. The machine A runs the application and it is mapped to the machine B. Both machines are logged in with the same user account and the mapped drive is logged in with that account as well.

Now heres the problem. Whenever the application tries to push that file out its getting a 'permission denied' error. I can't seem to figure out why.

Any suggesstions? The machine A, running the application, is NT4 and the other machine, machine B, is Win 2K.