Let's Make Robots!

old motors

H-Bridge only drives motor one direction:What am I missing?

(Perhaps I should preface this with the notation that NOTHING is working right today and I may just have gremlins.  That said...)

Are my motors borked?

A couple weeks ago I posted about my Rebound RC car which I'm trying to make into a robot.  I had trouble getting the motors running at the same speed.  It was suggested that my H-bridge was bad, so now I've gotten a new one and am still having trouble.