Customer project Settlement

Dear All,

i am working in customer projects. Actual cost and revenues r flowing.The RA key to the top WBS Element which is also billing element. I heve done the revenue based result anlaysis.Profit and loss are showing in RA. Now i want to settle the project to CO-PA.

Given settlement rule to top WBS Element and all other lower WBS element have profile not ot settle.if i run settlement CJ88 then nothing is flowing and not any error.

Need solution.