Vista/Mac OSX File sharing

I was running everything fine in xp/mac/shared drive via xp with mac
accessing share wirelessly configuration. I recently upgraded to vista and
had to reinstall my entire library, re-export, change paths to new vista
network location and re-import library on the mac.

Herein lies the problem.After reimporting my library I started seeing
connection was lost (server connection interrupted) to my shared drive
mount.. I ended up hard rebooting bc itunes was frozen (thrice)

That said, I can't play any song without either losing the connection, the
song stuttering or itunes freezing - trying to acces the files. I read about
handshakes and encryption that vista changes to nlrm2 or something, but im
running home premium so I had to regedit the local security policies and
change that manually from 3 to 1, but I believe that was for vista to connect
to Mac without username/pwd challenges. Itunes library connected to the share
still it freezes up.

Any ideas if this is a mac osx/vista compatibility issue? Or is it itunes
running off vista share? Suggestions? Comments? diatribes?

I dont want to revert to xp bc i dig vista and media center edition.

Please let me know.