Lock Violation when edit error pages settings IIS7

Hi,

I have a problem on my website, I called an ajax function to return HTML code from the database, the ajax call give me an error 404 not found even the url is valid and it's working on my localhost. After a lot of search, I found a solution to Edit the error pages settings 404 page when I tried to edit it, an error appears " Violation Error " Any solution to fix this error ? to be able to test the solution if it's working or not ? Or does anyone know about the http error that return my ajax call error function ?

Please help ASAP

Thanks in advance.


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this is the error msg from the ajax call :

HTTP Error 404.0 - Not Found
The resource you are looking for has been removed, had its name changed, or is temporarily unavailable. Detailed Error InformationModule IIS Web Core
Notification MapRequestHandler
Handler StaticFile
Error Code 0x80070002
Requested URL http://..../.../..../
Physical Path E:\web\.....\....
Logon Method Anonymous
Logon User Anonymous
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this is the error msg from the ajax call :

HTTP Error 404.0 - Not Found
The resource you are looking for has been removed, had its name changed, or is temporarily unavailable. Detailed Error InformationModule IIS Web Core
Notification MapRequestHandler
Handler StaticFile
Error Code 0x80070002
Requested URL http://..../.../..../
Physical Path E:\web\.....\....
Logon Method Anonymous
Logon User Anonymous