Windows7 with IIS

I had to reinstall everything on my laptop when a virus program wiped out my registry without first backing it up. Luckily I also installed PHPEd.

Now everything that worked before comes to a blank screen however I can execute the program with PHPEd.

This bombs out on my laptop:
http://127.0.0.1/utility/ad_hoc_query.php
With Status Code:500 Internal Server Error

This works on my laptop using either PHPEd or the URL address line.
http://localhost:8080/file:/C:/inetpub/ ... _query.php

I tried changing the connection to mysqli and changed from localhost to 127.0.0.1 but that didn't solve to problem.
I did not see any port info in PHPINFO and wonder if there is a problem between 3306 and 8080 and if so where do I change it?

If you have problems with IIS, you'd better ask Microsoft what to do.
As of mysqli -- it's also not our product. Please contact Mysql AB or post a question on their forum.