hi i have share folder in domain on win xp and win 7 user log on locally but hi can;t access to share folder bay name or ip i have an error about the permission please help me....

Make sure you can ping that XP computer from win7 computer, and also there is no firewall blocking (Windows firewall, antivirus firewall, etc) on that XP computer. In addition, you also need to enable file sharing correctly on that XP computer, you can check out this simple file sharing or share file with user/group permission article to get more ideas. Hope this helps.