Cannot communicate with computer in my network places

Hello,

i recently installed serv03 and XP as clients in a small setup.

Earlier everything was working fine, but now i cannot see any of my computers in my network places.

when i open the my network places > domain name > error message

= “XYZ is not available. You might not have permission to use this network connection. Contact the administrator of the server to find out if you have acess permissions.

list of servers for this workgroup is not available”

currently i login in the system = xp as adminstrator.

is this issue related to credentials or what…

please help before this problem make me go mad….