[solved]ogreode terrain heightmap file

hi

i downloded the prebuild ogreode demo and the sdk ,all worked fine but i have a litle trouble with the landscape demo
whene using the default terrain.png or my custom heightmap file generated with L3DT or freeworld3d the car stay stiked on the terrain and cant move it
but with the heightmap files come with the demos terrain01,02,03 all work fine.
please anyone explain me whats wrong

thanks

building ode with singlelib solve the problem