I suspect you have not registered your license keys on the forum.
Click Here (http://80.95.161.114/shipsim/forum/index.php?action=profile), then scroll down to where it says 'License Key Registration'
Also, you need to enable online access in the game. This can be done by clicking Profile in the main menu, then checking the box marked 'Enable Online Access' (or something like that)
If that doesn't work then I suggest you do what everyone else has recommended.
EDIT: I'm a berk...