I have a problem with my .htacces file.

This the problem:

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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, admin 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 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.
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How can i fix this ?

Or can onyone help me ?

My msn is: msn@twimas.com
(my english is not so good, I am borning in the Netherlands)
Thanks!
You can to post you massage here

Good beye.I be back

See you later!