SA Sch lines & quota

Scenario:

There are 3 vendors and there are Scheduling Agreement for all the 3.

Sch lines are to be generated for the reuqirements generated through MRP:

A split quota is assigned to them in the ratio 2:3:5. (20000;:30000:50000)

I generated a requirement of 100000 pcs as follows:

22.02.07 10000

23.02.07 10000

24.02.07 10000

26.02.07 10000

27.02.07 10000

28.02.07 10000

01.03.07 10000

02.03.07 10000

03.03.07 10000

04.03.07 10000

I want to have sch lines generated on the above dates to be split as per above quota.

I tried but the system is generating sch lines for the 1st vendor until hisquota is finished; then 2nd vendor until his quota is finished.

Pl guide.

regards

VS