We have an iis7.5 server setup running integrated mode, with a unique web id, which has full rights to the site location, but if we runn the wizard, the wizard doesnd show the checking database control, it basically is a single line box with no "checking database" text in it. and the db check always fails when you submit, however set the app pool to classic, then you can check the db access, but on the next page it says you need integrated mode, so we change it back to integrated and click retry and it finishes the install fine.

Any idea why this is happening and what is a fix for this, as I have a few sites I want to run in a shared environment.