hello i got one issue on pricing

hello sir,

I got one issue in pricing,my company having around 3500 materials,for this materials they have subdivided in to parts to give the discount to this,for 500 materials 20% discount,for 1200 materials 40% discount like this and in material master data MM consultant has maintained material pricing group as p1,p2,p3 p4etc, i have copied the condition type KO30 customer/material pricing group,and assign the access sequence to this and maintained the condition records as customer -1233456,material group-p1 as 20%,p2 as 40% like this,now it is not coming in the order level,if i gave mannualy it is taking but,automatically its not taking is it i am doing the right thing or not,please guide me