Registration issue

So I have not played this game in awhile and I just bought entrenchment and figured I would pick the game back up.

Well to play I have to update it but it says my registration expire date is invalid and so is the whole thing itself.

This doesnt make sense considering it was fine when I bought and installed it a long time ago.

So whats the deal? Am I out 10 bucks for something stupid or can I play again without buying SoaSE again?