Plugin not working properly

I am getting this error msg :

The page cannot be found
The page you are looking for might have been removed, had its name changed, or is temporarily unavailable.

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when i click on admin this Option/Resent Comments i get url http://www.soframiz.com/wp-admin/get-recent-comments.php

can you explain how this plug in gonna work on my Admin page i need to fix characters its too long..