I have a problem in FS2 where after I get a lock with a aspect seeking missile, the aspect lock noise doesn't stop... EVER! It continues to bleep if I lose lock, change target, destroy ship, etc. If I lose lock then regain it, I have two alarms overlaying eachother. Third lock, three alarms. It get's quite annoying by the end of the mission. It does stop outside missions though.

Windows 7 x64 / Asus Xonar DS

Is this with the regular FS2 executable, or FreeSpace Open?

(If the former, have you tried FreeSpace Open?)