Project System Report for AP and AR

Hi,

Working on a process where man hour, equipment cost, AR and AP should be captured in a PS WBS element. Posting for man hrs and equipments are through service order and AP/AR are through FI posting. Throught controlling view we can see that cost is capturing and most of the standard reports are working except S_ALR_87100191, S_ALR_87013573 , S_ALR_87013575 and S_ALR_87013574 - Expenses , where Receipt and Expenses are most important. Is there seperate settings needs to be done in CO or PS area to make this report work...??. I always get error "

No costs, revenues or finances were selected

Message no. OK602"

Help would be highly appreciated......

Thanks.