I had the same problem. Got help that i shuold install .net framework or something like that .. but doesnt work after that either.
now it complains:
unable to find a version of the runtime to run this application.
THis is important: what are the controls I should set if I played Tribes? I'm a bit confused..
put the jump/jet combo as your right mouse button
i use the down/jet combo as my "jump" button
that way if i hold right mouse and "jump" (from t1) i idle my jets...finger off right mouse downjet, finger off "jump" and fly up
i still suk at skiing this game but its the best way for tribers