Vista xp sharing problem

[GTV61]

I have a network of 6 computers. Four of them are running xp one is vista 32 bit and the other is vista 64 bit with a raid ( stripe) setup. There is one XP computer that cannot access any drives on the vista 64 bit computer. The sharing is set to "Everyone" Please help before I get the big hammer.

 

[computabug]

Reformat? idk... I've got the same problem with my old P3, I just don't network it in that case

Make sure they're in the same Workgroup? But I'm pretty sure you did that already...