Error Logging Into Multisite New Site

I set up a multisite network for my site at http://www.HousingUniverse.com and it appeared to go well. I used sub-directories and my hosting is a deluxe plan (unlimited hosting) with godaddy. I then went to site admin and created a test site called “davidtest” at http://housinguniverse.com/davidtest/ and it shows up in the browser. The problem is that the login URL at http://housinguniverse.com/davidtest/wp-login.php does not work. It just gives me an error of

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator 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.

Apache Server at housinguniverse.com Port 80

I am trying to figure out how to solve this or what I need to do on my end…thanks in advance for any help!