Not able to share folder

Hi,

I am having an machine loaded with Win Xp 3 & we had a shared printer & folder configured on this machine through all our users used to access the shares.But not when i try to access the same shares which was earlier accesible now gives an error as "\\192.168.1.151 is not accessible. You might not have permission to use this network resource.Contact the administrator of this server to find out if you have access permission. There are currently no logon servers available to service the logon request".

While i am able to access other machines from this & even the ping is working fine.

When I try to access the shared machine through RUN command it asks for User Name & password but then it given the same error as mentioned above.

Request you to please help me with the solition.

Regards,
Abhijin