hi, i'm having a problem that is driving me nut!

i have an asp.net application runnning in a server.
the application allows to uploading files.

from my computer i can upload files without any problem, but i test it from
another computer and it throw me an exception: "The given path's format is
not supported s".

how can it be possible? course both computers against the same server.
i'm using the HtmlInputFile and the PostedFile.SaveAs method, anyway like i
said before, the application is working from my computer.

thank you!