Hi,
Thank you very much for the help on particular configuration errors on my site. Very much appreciated.
Sadly it stills not working :/
I click upgrade, I click modify invoice adress, I click save. and then I get "not authorized". But I notice there is some javascript error going on in IE. So Ill investigate it further and see if I can get any more debug information that can helps tracking down the problem.
Ill also download and try reproduce it in Google Chrome. Narrow down the potential search area as much as possible
-Kristian