If your having trouble registering your game contact [email protected] or [email protected] , either of them will be able to point out whats wrong and direct you how to fix it.
Please note that it was a holiday weekend in the US, so Stardock might be a day or 2 before getting you an responce. First come, first answer rule. No one said either was perfect but both have had some of the best Customer service Ive seen. Make sure to check your spam filters when waiting for a responce, alot of times their support responces get automaticaly filtered by email providers. People see no responce and assume support doesnt care...
Also you will need to download Impulse also to update your game to the current version to play on ICO with other players. Also if you plan to play alot online on ICO it be best to go ahead and get Entrechment also, since the majority of games are now played on that.