Sharing folders in network

[lohnn]

Hi!
I have a problem with sharing some of my folders.
From my file system disc it works, but from all other discs I get the message "failed to mount windows share".
Even when I try to connect to it from my own computer.

Anyone have any clues how to fix this?

EDIT:
And from my Windows 7 computer I get the error "Windows cannot access \\computername\movies".
It tells me to check the spelling of the name and such...

-Lohnn