Multifunction Composite Gadget driver problem

Hi,

I want to activate the Multifunction Composite usb gadget driver for the Blackfin BF548 and the 2.6.3 µClinux distribution, and I need to have RNDIS and COM port running together.

But I have a problem which consist on a reset interruption rises randomly over the usb port which disable the possibility of sending and receiving data over the COM port of the gadget.

I need to know which are the kernel configurations to activate the Multifunction Composite usb gadget driver? And how to resolve this problem?

Thx in advance.