HTTP 404 error

Jan 9 2009 7:04 AM

an asp application contains 4 tabs iis is 6.0 o.s is windows xp.Xp contains service-pac 3.0.page load 1st tab is loaded but when 2,3,4 tabs are clicked msg comes  HTTP 404 error  and page of respective tab is not painting.can any one help to resolve the problem.

Same application is loaded in windows 2000 with service pack 4 above mention problem is not comes.