Windows 7: network accessing files issue

hi, a friend of mine is trying to access files residing on a vista pc residing on the same network as his 7 pc in order to copy them over. cunningly, both pcs have exactly the same network name albeit one in capitals and one in lowercase although i am pretty sure this does not mkae a difference. can anyone tell if this is where the problem lies, especially since another vista pc on the network shows up fine

Hello,

Create the same UserName and Password on both computers.

Alternatively, try accessing the shared folder od Drive this way:
Click on the Windows Orb, type \\ComputerName\SharedFolderName press enter, also the Computer Name can be replaced by an IP Address.