XOOPS 2.0.13a conflicit with mod_security2? (error while click "MODIFY USER")

[chk125]

After downgrade from VPS to shared hosting account, when I try to "modify user" using admin panel

 

Return the following web page --

 

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Not Acceptable

 

An appropriate representation of the requested resource /myxoops/modules/system/admin.php could not be found on this server.

 

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

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The URL generating above web page is --

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http://www.mydomain.com/myxoops/modules/system/admin.php?uid=81&op=modifyUser&submit=%B0%F5%A6%E6%21&fct=users

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I suspect it is related to a loaded module -- mod_security2

Since I am now using shared hosting account, I cannot override this module using .htaccess

 

Could anybody give me some advise? (source code of related php enclosed)

 

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