As long as you log into Impulse using the same info that you log into the forums with, you should be good as far as that goes. You'll need to create an IronClad Online account (which you can do in-game), but you'll need your serial. You can get it by right clicking on the game in Impulse and selecting 'View Registration', and from there, you can copy it to the clipboard. Once you have your ICO account set up, you should be good to go.
(If you opened a support ticket, and this solves your problem, send another email so we can close the ticket. Thanks!) 
