Confirmation of Prd order

Hi Friends,

While i am tryinhg to do confirmation of prd order, i am getting this error "No prices could be determined for object Activity type 1000/9999/xxxxxx"

I am maintaining the prices in KP26 for the above activity.

While i am trying to save the confirmation the error message saying " Confirmation terminated due to incorrect actual costs".

Please help me to resolve this.