nvidia 64-400 mx

Hi Guys have a little problem i got p3 1000, 256 ram vid-card 64/400 mx every thing has been fine until running f/s 2002 everything has been fine until now load f/s sitting on runway start take off run and jurking starts have checked what i know but that is not much like i say since i re formatted i only just have flinghtsim thats it on my hard drive updated driver to 53.04 had the latest there tryed that no good reinstalled again no go not a wiz but learning thanks for the reply well i have been flying 737-300 Air Zealand grate plane when you load and plane is on runway it seams to drop down a little set flaps for take off trottle up let brake go and plane starts and jurks a little most of the planes seem to do it at this stage it is the only plane i have imported because of that it never was like that but is there any thing i can do what about a raden 9200 another 256 of ram it has been pretty good until now not nowing much about computers so i am a bit in the air cut back the sliders min to see if that helps still that jurk sorry to be a pain cray