After several email exchanges with Steve Coutere at myautoevents I was finally able to register online and wanted to share some info in case others encounter a similar problem. The paypal website would not accept my billing info and posted an error message saying my city,state and zip code info was incorrect or invalid. Since we knew that was not the case,I rechecked my online profile at *REMOVED CARD PROVIDER*,the card issuer,and noticed it was in all caps-which I had tried-but there was NO apostrophe in O'Fallon. When I did all caps with no apostrophe it accepted it. I'm now finally registered and looking forward to it as well as the 11th. In case anyone else encounters a similar problem the payment processing site is obviously very particular about the format of the required info.
Mike Kenney
-Edit from Chris: I removed the name of your card holder, assuming you also have insurance through them, no need to post that info here 
Mike Kenney
E46 M3