I am currently offline at home and have been trying to play entrenchment offline. Unfortunately I had to reinstall (entrenchment) via impulse through archive files I kept around for just such a purpose (loading a game I purchased in case i was offline). Now, however, even though impulse remembers my CD key, it still won't activate because it can't reach the internet. How do I play this game I bought and have previously registered online, without being able to connect to the internet?