Quoted:
Need some help... recently (past week) I noticed when executing various searches within the EE, and then trying to access the result threads, I get the following error:

Server Error in Application "LIVE"

Internet Information Services 7.5
Error Summary
HTTP Error 404.11 - Not Found
The request filtering module is configured to deny a request that contains a double escape sequence.
Detailed Error Information
ModuleRequestFilteringModule
NotificationBeginRequest
HandlerStaticFile
Error Code0x00000000
Requested URLhttp://www.ar15.com:80/forums/t_7_159/894388_WTS__Vltor_EMOD__KAC_RAS__Tango_Down_Stubby.html&light=tango+down
Physical PathD:\wwwroot\2009-ar15\forums\t_7_159\894388_WTS__Vltor_EMOD__KAC_RAS__Tango_Down_Stubby.html&light=tango+down
Logon MethodNot yet determined
Logon UserNot yet determined
Most likely causes:

   * The request contained a double escape sequence and request filtering is configured on the Web server to deny double escape sequences.

Things you can try:

   * Verify the configuration/system.webServer/security/requestFiltering@allowDoubleEscaping setting in the applicationhost.config or web.confg file.

Links and More Information This is a security feature. Do not change this feature unless the scope of the change is fully understood. You should take a network trace before changing this value to confirm that the request is not malicious. If double escape sequences are allowed by the server, modify the configuration/system.webServer/security/requestFiltering@allowDoubleEscaping setting. This could be caused by a malformed URL sent to the server by a malicious user.

View more information »
***** END*****

Criteria using for search:
1) Yesterday was keywords via "Daniel Defense" in titles within 24 or less (threads, not posts), EE forum selected...
2) Today was keywords "Tango Down", same criteria and then error again.   Even my own WTS thread failed when trying to access within search results.

Suggestions?????

Thx in advance,
Paul