WordPress MU

I uploaded a new theme and went to the theme admin page, selected yes to activate and then clicked update theme.

It returns a page with two forms and a button below that says authenticate. When I select activation I get a
:Redirect Loop

Firefox has detected that the server is redirecting the request for this address in a way that will never complete.

The browser has stopped trying to retrieve the requested item. The site is redirecting the request in a way that will never complete.

* Have you disabled or blocked cookies required by this site?
* NOTE: If accepting the site's cookies does not resolve the problem, it is likely a server configuration issue and not your computer."

thanks

Have you successfully added themes in the past? Is this a premium theme?

yes I have and no it is not.

"It returns a page with two forms and a button below that says authenticate. When I select activation I get a
:Redirect Loop"

What's the page with 2 forms? Because it's not supposed to do that.

premium theme shouldn't matter.

"It returns a page with two forms and a button below that says authenticate. When I select authenticate I get a
:Redirect Loop"
I do not know what it is. It has two rectangles that look like a place to add your username and password. I tried this but it did not matter.

Got a screenshot?

btw. I wouldn't just enter my login details into a form that pops up after I change themes, who knows where it might be reporting your login details to...

Oh, yeah :) Crap in themes footers? :) Saw that several times... Bastards ;)