Usb storage not reconized


I just got the wd tv live hub media player 1 got 2 usb harddisk u normaly use the smallest one 320gb without power supply is been reconized and works fine.

the 1tb wd element with powersupply works fine when i attach it to the computer but is not reconized by the wd tv live hub lot of films on it so … i feel a bit sad can someone help me plz?