iAd workbench, can't login
I am trying to login to iAd Workbench using the instructions here to set up my first campaign.
When I try to login, I just get returned to the login screen, with no errors or messages, so I can't log in to iAd workbench.
Is there something else I need to set up first?
iMac 24, iMac20, Mac Book, Mac Mini, Mac OS X (10.5.5)