Tank Treads

I’m doing some tanks for a friend of mine’s game but I don’t seem to get the treads right.
When duplicating along a path the treadpieces don’t rotate with it. (see pic)
How do I fix this?
http://data.fuskbugg.se/skalman01/Blender.JPGhttp://img16.imageshack.us/img16/8484/blenderl.jpg

Eppelyakt

Maybe this thread can help?
http://blenderartists.org/forum/showthread.php?t=109214

Thanks Atom! :stuck_out_tongue: