Hi, 
its my fault
material computer price is 900
Sales Order ZNGO ==> material condition: ZCPR = 1000
now we want to make a discount==> zdcp = 10 ==> the value remains 1000
at this stage nothing happen because we changed the computer price first.
the value must change to 900 but it doesnt!!!
what should we do??
thanks a lot
best regards.