Unable to authenticate to WPMU when I try and install WPMU Dev Dashboard

Hello,

I am trying to upgrade WPMU Dev Dashboard-- however when I get to the screen where I have to install my WPMU Dev email ID/password-- there when I click on "Already a member? >>Click Here<<" there is no change at all.

How do I login to WPMU Dev and configure the WPMU Dev Dashboard?

Thanks,
Arvind.