Installing muliti wordpress sites on IIS 7

Hey People,

Im trying to make 8 wordpress sites on the my domain which allready have a wordpress site install on http://www.notmysite.com aka the wp_

The server is a Windows Server 2008 R2 running IIS 7

Well i can easy install all the 8 wordpress sites on http://www.notmysite.com/homepages/Home1-2-3-4 and so on.

When i install my templates it gets installed correct, but only the “index” page work. If i try to click anywhere it goes to “404 not found” on the the homepage/Index of the http://www.notmysite.com wordpress installations.

I tryed to search around on the web and i found out it was the Perma-links, but if i just click on Permalinks in the wordpress admin panel it goes to

“500 – Internal server error.
There is a problem with the resource you are looking for, and it cannot be displayed.”

So how can i get this fixed? Something with the web.config because if i delete that one it automatic works again, but thats only the home/index page.

[ No bumping please. ]