Vista - server file access problem

tried 2 two domain ID that do have access to the same folders on XP work
stations but when login in on a domain Vista member, can't access some of
the same folders and files under a particular share. I get access denied
errors. actually those folder not accessible are not visible form vista
but accessible and visible form XP The folders are definitely not hidden.

does order w2k3 security group or primary security make any difference in
access wk2 fills server from vista?

would deleting the profiles help?