samba 3.0 winxp problem

i have suse linux 9.1 set up as a file server and i have a problem. in one of my shared folders i'm not able to see some of the files in the folder from xp clients but i can see the same files from win 98 clients. and it's not a user rights problem because i tried connecting with the win98 user from an xp machine and i could'nt connect either.