Originally Posted by thaisolar 
Is it possible that the board that I'm using have problem? I am using circuit board that order from "http://www.embeddedtronics.com/".
I am very confusing now... 
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IMHO, you will never get that board working. I had nothing but problems with it. And alas, although embeddedtronics responded with an idea that it may have been a bad circuit board with a missing trace, unfortunately it wasn't.
And even though their board was obviously not working they weren't interested in looking at it to solve the problem. I bought a bare PC kit based on the original layout from Uli and transferred as many parts as I could off the embeddedtronics board. That board with the same motor and power supply worked perfectly. No problems.
It's a flawed layout.
John