vendor evaluation price level not updating

Hi Guys,

I have Configured Vendor Evaluation

Maintained Price,Quality, Delivery

Sub criteria

Price level, Price history,Market behaviour

and also sub criteria for Quality and Delivery

maintained weighting as 1 for 3 criterias

maintained points score for the criteria price

4 Automatic Determination from Purch. Statistics: Price Level some scores

i have also maintained market price in MEKH

me61 also working

i go for ME63 it is not updating for Price level and History

i have created 30 POs with Diff prices less than market price equal to High

and i have caliculated formula marketprice-effeprice*100/marketprice and given the same prices in PO and done GR

Still it is not Updating Price level and I have Deleted the scores for Delivery and Quality in config tried only taking price still the Price level is not updating

Pls Tell me how my Price level Updated........is that i have to do changes or this config is wrong pls tell me

Thanks....