WordPress MU

I've mistakenly changed my General settings. Before my change, I could edit http://www.pagestrategy.com. Now, my improper redirect to http://www.mercurybrief.pagestrategy.com causes an error.

http://www.http://www.mercurybrief.pagestrategy.com/wp-login.php?redirect_to=http://www.pagestrategy.com/wp-admin/

Attached below is the error message. All I want to do is change the settings back, but I wasn't able to get back into General Settings to do that.

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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@mercurybrief.pagestrategy.com 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.

Apache/2.2.11 (Unix) mod_ssl/2.2.11 OpenSSL/0.9.8i DAV/2 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 Server at http://www.mercurybrief.pagestrategy.com Port 80

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You'll have to go into the database under wp_1_options and change it there.