Win 2003 SP2 Having “Generic Host Process for Win32 Service error”

When ever my server starts it gives me this error:

Generic Host Process for Win32 Service error
——————————-
szAppName : svchost.exe szAppVer : 5.2.3790.3959 szModName : ntdll.dll
szModVer : 5.2.3790.3959 offset : 0001a3b4
——————————-

“Server” Service stops and never starts ???

please help … !!!!