Cannot see USB External Storage

Hi
Got one of those SmartTv Set top boxes running Android 4.0 with BOXCHIP A10 ,CORTEX A8 1.2GHz processor, and 1GB DDR Ram.

XBMC Frodo 12.0 for Android installed like a charm and even got the interface running flawlessly.

I plugged in a 500GB Seagate HDD with Videos which immediately showed up as external storage on the Set Top Box.

But when I goto Videos>Add Files I just cannot see the USB External Storage option. Can only see the SD Card option for external Storage.

Anything am missing out? Do I have to install some USB add-on or something?

Ankz74