Thanks For Reply,
i forgot to mention that i use in that control Ajax Controls Toolkit (Tab Control) version 3.0.30512.1 and FrameeWork 3.5.
the Error Page is "An unexpected error has occurred."
Here the the last line of Log File
02/01/2010 10:46:20.41 mssearch.exe (0x0DBC) 0x1A7C Search Server Common
GatherStatus 0 Monitorable Unlock Queue, project Search - File:d:\office\source\search\search\gather\server\gatherobj.cxx
i don't know what is wrong maybe about Ajax Toolkit.