USB Host issue

Hi All,
i have tried to plug the usb hub(4-port & USB1.1 ) in the beagle
board, which has ehci host control.

hub_port_init API getting failed in usb.c and returns the error code i got the below message

"hub 1-0:1.0: unable to enumerate USB device on port 2 "

could anybody help me in this regard.?.