sorry guys, havnt seen the thread for a while. yeah that would be your best bet, just buy a BRAND NEW copy, INCLUDING the CD KEY.
you must uninstall EVERYTHING. go to the add remove programs, delete it there, then go into my doccumments > and DELETE the TEST DRIVE UNLIMITED folder. That is your saved game, which includes the cd key you put into the game that is blocked from the servers.
RE-INSTALL TDU.
do what you did the first time, but make sure you put in the NEW cd key. Learn from what you have done (downloading illigal megapacks), AND DONT DO IT AGAIN! :happyroll:
If that doesn't work, then if possible, reformat the hard drive, (re install windows), or buy a new hard drive and install windows on that, then install TDU as i have said in the above 2 paragraphs.
HOPE THIS HELPS!