BF2 Problem: can't use the booster pack/wont register

I recently installed the Battlefield two booster pack which contains both the original game and all it's expansions. They all installed just fine and work in single player.

However, if i try to go online to the newer maps and servers it kicks me out straight away telling me i don't have O/S privileges. The only two problems i could think of is a Patch Update or the fact that the booster registration link sent me to 2142 and i couldn't register.

Any and all help would be appreciated.

 

make sure you have patch 1.51.

If your running vista or Win7 you must run as admin otherwise this error occurs.