Edit_Post Function not under wordpress directory

I have recently installed WordPress on a windows server running IIS7. After several headaches getting the default page and redirects up and working, there remains one issue.

In the admin role, when I click the link to edit a page or trash a page the wordpress directory disappears. For example here is the URL for the Pages page:

http://dev.domain.com/wordpress/wp-admin/edit.php?post_type=page

But when I select a page to edit the URL is shown as:

http://dev.domain.com/wp-admin/post.php?post=923&action=edit

Notice the wordpress directory has been stripped out. This happens with the edit, trash and examine links. The quick edit still points to the wordpress directory.

Any help is greatly appreciated on how to resolve this.