On my ATI radeon 9200 SE, when using VBO with wireframe mode, glDrawElements call will crash, but it works fine with NVidia card. Does it be a driver’s BUG?
Which Catalyst version do you use?
Anyway this belongs into the “OpenGL coding: advanced” forum (which is also read by ATI devs).
Since the advanced forum is down, you may try the “beginners” forum instead.