Unable to enumerate device on Port-2 for Logitech Cool camera

         I am using the Beagle Board C3, it's booted with Linux and
working fine in 2.6.29 kernel, Now i am facing problem when i am
inserting the Logitech Cool Cam in USB Host interface. I install
videodev,v4l-common , v4l2-compat drivers along with gspca-zc3xx
driver for Cool cam module. The kmesg " Unable to enumerate device on
Port-2" i am getting, After that the usb port not at all working. If i
use Motorola Camera using UVC video driver, then it is detecting. what
is the problem i am unable to find it.

thanks in advance