YGPARK 
I had made my custom board by Micro2440 stamp module. I have a Activesync problem. The driver seems to be installed sucessfully. When I change this micro2440 stamp module on the micro2440 SDK board, all is o.k. When i replace it on my custom board,The USB driver is recognized. But, Activesync is not running. I added USB host circuit but USB client hub IC in my board. How can I solve this problem? please help me.