access to windows xp home

hi all;
i am feeling a trouble to access windows xp home edition from windows 98 or windows 2000.
windows xp system and windows 2000 or windows 98 system has same workgroup no dns or dhcp, problem is that when i find a windows xp system from windows 2000 to access in username and password window appear and i enter a username and password which is windows xp system username and password and its also logon from this username and password but it can not access no error accured.
can everyboody help me for this problem
thanks