Beagleboard USB connection


I am trying to Boot OMAP 3530 from USB. I am doing that by pressing
and holding the 'USER' button down while I press and release the
'RESET' button on beagleboard.

The issue is that the device appears in Device manager for like 2-3
seconds and then goes away. I have to reset the OMAP to get the device
again appear in device manager. I have been able to install usb driver
for OMAP (csstusb.sys) in that brief period of appearance but it still
doesn't stop OMAP to disconnect after few seconds... I have tried it
for Windows 7 64-bit and Windows XP 32-bit...Any suggestion is