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USB module stops working when using bootloader.

Pujie Zheng
Prodigy 30 points

I'm using the eZDSP C5515 board.

I modified the example for USB which simulates the DSP board as a mouse to PC.
And  the control transportation of endpoint0 is successful when using CCS.

I want to write the code to NOR FLASH, and let the board bootloading itself.
I set the XF led flashing firstly for 3 times to indicate whether the bootloader is successful.
And with the board bootloading itself, I can observe the XF led flashing as I set. It means the bootloader is successful to some point.
But the USB module isn't working. The host can't detect it at all.

I've set the MPORT out of idle, but still can't get the USB module working with bootloader.

I wonder if anybody has already successfully using the USB module with bootloader.

Thanks!