The standard Google Apps URL for your domain’s Control Panel ( has a nasty redirect-loop, preventing successful login:

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

Technically, you are receiving a HTTP status 310, redirect error:

     Error 310 (net::ERR_TOO_MANY_REDIRECTS): There were too many redirects.

Fortunately, there is another way to access your Control Panel: log on to Google Mail using an Administrator-account for your domain:

     <a href="" target="_blank"></a>

There, you should find a “Manage this domain” link in the upper right hand corner. It will take you to the Control Panel.