My OS is Win2000 pro with sp4 & rollup1 , and my IE frequently goes crashed when i set "CheckHSRE"=1... And it prompts that "wininet.dll" is wrong and IE must be restarted. The version of my "wininet.dll" is 6.00.2800.1525 Details: AppName:iexplorer.exe AppVer:6.0.2800.1106 ModName:wininet.dll ModVer:6.00.2800.1525 Offest:00094f80 I tryed to test all of the BetaFeatures one by one , and found the error I discribed before only happens when i set "CheckHSRE"=1 . And I remembered someone has reported that "f04_ok" only appears when the "wininet.dll" is in early version.... Could anybody tell me why it happens ?? Thanks a lot.