USB Host Enumeration problem

Hello,

I've never done a USB Host interface before, now I am trying to
enumerate USB Host using NXP's USBHostLite example using LPC1768
controller.

It stuck at "while (!HOST_RhscIntr);"

I got a short serial output followed by flashing

----------------------------
Initializing Host Stack
Host Initialized
Connect a Mass Storage device
-----------------------------

Can anybody tell me why

"LPC_USB->OTGStCtrl = 0x3;" statement is using. And if I use
"LPC_USB->OTGStCtrl = 0x203;" this statement then serial output is
followed as

------------------------------------
Initializing Host Stack
Host Initialized
Connect a Mass Storage device
ERROR: In Host_EnumDev at Line 358 - rc = -1
---------------------------------------------

The line (Line 358 in usbhost_lpc17xx.c) is this block of code:

rc = HOST_GET_DESCRIPTOR(USB_DESCRIPTOR_TYPE_DEVICE, 0, TDBuffer, 8);
if (rc != OK) {
PRINT_Err(rc);
return (rc);
}

Could it be an issue with my USB drive or hardware?

Many thanks in advance,

-Prakash
9886545216