problem with physics

im making this helicopter game, and i have the bounds of the heli set to box. because thats the only bounds i could get to work with bullet physics. anyway when i run the game, if you the heli is on the ground for more than five seconds, you cant control it. it becomes a static object or something… heres the .blend. any help is much appreciated. thanks in advance

http://www.freeuploader.com/download_viewer.php/53b06916548c336c3bc9246bc80ebb54.html

the controls are wasd and arrow keys. theyre pretty messed up right now, but you dont need to use them that much to get my point. just use w to go up.

nevermind, fixed my problem. i should look more closely at previous threads. for anyone having the same problem…

https://blenderartists.org/forum/viewtopic.php?t=61382

my heli still bounces around a little though for some reason… its not a problem at all though.