[ODE] trimesh-cylinder

[THD]

hello, I've got a vehicle with 4 wheels. I also have a big trimesh and I
want my vehicle to drive around on the trimesh. And this works as long
as I use spheres as wheels, but if I use ccylinders ODE crashes with
this errormessage:
"assertion "Index >=0 && Index < (Flags & 0x0ffff)" failed in
ode/src/collision_trimesh_internal.h:124"

Can't ODE handle ccylinder-trimesh collision? If not, what should I use
wheels? Spheres makes my vehicle flip over and act overall bad.

All help appreciated.

	/Sepultang