Attaching settlement rule to the maintenance plan

We have a requirement to create a maintenance plan and assign a settlement rule to the same. I was able to create the maintenance plan using MPLAN_CREATE. I created the settlement rule using the function module K_SRULE_SAVE_UTASK. My problem is when I go to IP02 to check if the settlement rule has been created for the maintenance item, it is not found. When I click on create and go into the settlement rule maintenance screen, I'm able to see the settlement rule created using the function module. In the MPOS table, I don't see the indicator IND_ABRVO ( settlement rule indicator ) has not been maintained. Can you please help

in finding out what I'm missing.