Settlemetnt Rule problem

Dear Experts,

I have maintained the necessary settings for my order Type PM01

in IMG -> Plant Maintenance and Customer Service -> Maintenance and Service Processing ->

Maintenance and Service Orders -> Functions and Settings for Order Types ->

Settlement Rule: Define Time and Creation of Distribution Rule

When I release the order , I am getting the error

Order cannot be released: settlement rule not maintained

Message no. IW557

Diagnosis

Your system has been configured in such a way that you can only release a maintenance order

if a settlement rule has already been maintained for it.

System response

The system cannot perform the function.

Procedure

Maintain the settlement rule and then release the order.

Can anyone help me where I went wrong

Regards,

Shareeq