Constantly asks for "billing info" refuses to download anything
I have the app-store on 3 macs. an imac, an air and a MBP.
on the imac and the air it works great, buy an app, it installs and updates - perfect.
on the MBP however no apps from my "purchased" list will install. the store asks me for a password (despite home page saying "welcome Andy" (i.e. i'm already logged in).
If i enter the password, the "sign in" button changes to a blue "billing info" button and it gets stuck in a loop and constantly asks me to enter my password.
"installed" apps are listed in the store but will not install. If I try download a new app it goes through the same "enter password" routine as listed above.
help me obiwan etc etc....
MBP, 2.2Ghz, Mac OS X (10.6.6), Meat Eater.