Internal Server Error – не входит в админку

Последним ставил плагин all-in-one-seo-pack. Но все работало после него. Сейчас не могу войти в админку. Пишет
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Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, webmaster@****.info and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

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

——————————————————————————–

Apache/1.3.39 Server at www.l***b.info Port 80

В логе написано:

[18-Oct-2007 00:25:59] PHP Warning: strpos() [<a href=’function.strpos’>function.strpos</a>]: Offset not contained in string. in /home/**clu/public_html/xmlrpc.php on line 64
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В .htaccess :

1. -FrontPage-

IndexIgnore .htaccess */.??* *~ *# */HEADER* */README* */_vti*

<Limit GET POST>
order deny,allow
deny from all
allow from all
</Limit>
<Limit PUT DELETE>
order deny,allow
deny from all
</Limit>
AuthName www.***.info
AuthUserFile /home/**clu/public_html/_vti_pvt/service.pwd
AuthGroupFile /home/**clu/public_html/_vti_pvt/service.grp
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Я в коде ниче не менял