Accounts with zero posts and zero activity during the last months will be deleted periodically to fight SPAM!
I think you havent' SDL headers on you installation ? Could you check ? If you have them, check they are in a directory that is used by your compiler.
Probably you're using the 8.02 with its compiler, which is not compatible with vista/7... 1. Wait for the 10.05 release which will have a working compileror2. Upgrade your compiler with one from here http://www.tdragon.net/recentgcc/p.s. you're breaking the rules of the forum! You should always state the versions of the software you're using...