Like the title says, i can login the website and forums just fine using my Stardock account.

But when i launch the game from Steam and try to login to online multiplayer it "invalid username and/or password"

Any help would be appreciated.

I changed my username from Cyberaapje with a bunch of numbers on the Stardock website to just Cyberaapje, so i could remember and login to the game easier.  Maybe that's the issue? (i don't remember the bunch of numbers behind my name which i removed, so i can't try login using that).