Slush's Pool only shows a quarter of my Hash power!

[jasonsteer]

Hi All

I have a pair of antminers plugged into my pc using bfgminer connecting to slush's pool all is running well at 4Ghash's.

i then decided to buy two Antminer u2's and a raspbery pi with mine peon installed (did it yesturday)

i also used bfg miner on minepeon, everything is working great showing 4Ghas/s on the Pi.
however when i made a second wroker in slush's pool for my new minepeon device it only shows 900 Mhash/s over 24 hours instead of 4000 Mhas/s

here is a screen shot of my mine peon:
http://www.her-best.co.uk/Images/Capture2.png

Here is the screenshot for Slush's Pool:
http://www.her-best.co.uk/Images/Capture1.png

can anyone tell me if i have done somthing wrong (its wroker 2 BTW)

[jasonsteer]

Ok, I think i may have amade a school boy error.
It may be because my usb hub is not pulling enough amps, i will investigate and report back later.

[zetaray]

Your hashrate is constant, but not all hashes are successful. Pools estimate your hashrate from your successful shares. So, if you are unlucky, your reported hashrate can be a lot lower than your actual hashrate

[GodfatherBond]

Just wait some time and it give correct number.