THanks for trying to help me out guys, but i just joined the pool a few hour ago the the average hash rate in last 10 rounds is blank. and the column that says   Mhash/s keeps increasing every tie i refresh currently showing  3074141.745 , and as i stated i have no where close to that power.
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Eagerminer,  Hopefully, this explaination might help you out a bit.

     On your "Account" page near the bottom under the heading "Workers" you will see the "Average hashrate in the last 10 rounds:". That information will be blank until you have been "mining" for at least 10 rounds (read "the pool has resolved 10 Blocks"). If you've just joined the pool in the past few hours, you haven't been here long enough to have been part of the "last 10 rounds".

     In the area just below, you will find your "worker's" reportable efforts, including "Current shares" which is what your "reward" is based on, as a percentage of all the shares contributed to the effort of resolving a specific "block" (please note that this number will "reset" to 0 each time that the pool resolves a block, so don't fret when that happens. It's keeping track of your effort with regards to the current "block" the pool is working.) A bit to the right of this you will see "Mhash/s*". That is where you will find "your hashrate". Please note that this hashrate most likely will start out quite low with regards to what may be reported by your "mining software package" but it will grow as your mining continues until such time that it "approaches" the figure that is either reported by your "mining software package" or the "magic number" that you expect to see based on the type and strength of mining hardware you have connected to the system. Note that it will most likely NOT match your expectation exactly because of many factors, but most important is that it is near your expected figure. The "pool" figures this hashrate out based on the number of "shares" that your mining software is submitting, as well as the number of "shares" that are "accepted" or "rejected" and may also be affected by the number of hardware HW errors that your equipment is experiencing, so all these factors bear effects on the "reported hashrate" and are a true reflection of your equipment/mining software package performance.

     If the numbers you ultimately see closely reflect the numbers you expected, then you have nothing to fret about. If they don't match up like you expect, then you need to be questioning the equipment, or the mining software package, or the manner in which you configured the combination.