ASIC miner led lighting continuously green

[LuckyDime]

Hi all,

I need some help. Yesterday I've tried to install my third Asic miner USB Block Erupter to my powered hub. Till then, the previous two worked fine. But when I started cgiminer, one's led remained lighting continuously (not the new). It's hashrate is 333MHash, but other values like A, R, WU is 0. Some hw error message also appeared.

Could it be 'cause lack of power of the hub?

It's a kind of this, plugged an 5V/2A adapter.

http://www.4world.pl/files/products_gallery/219960136307946751478.jpg

[LuckyDime]

I've changed the USB Hub for a 7port powered one, and all ASIC works fluently.