Lpc-h 2148 on Xbox 360 JTAG

I bought this LPC-H2148 at Sparkfun 6 months ago. It worked flawlessly to jtag my Xbox 360 until today.

Strange problem appear:

  1. USB Link LED is not working anymore. Only Power LED is ON.

  2. I cannot detect, Read or Write, Xbox 360 NAND

  3. But, I can reflash LPC-H2148 (detect, erase, rewrite any .hex) using FlashMagic.

  4. I can reflash Mouse Demo in it, but the mouse pointer is not going anywhere (Green Led is On)

So, any help ?

Xbox 360 JTAG Schematic :

http://img188.imageshack.us/img188/2601 … tersmd.jpg

Thanks