Control Billing by Top Task

At Project level I have selected the option 'Invoice Method at Top Task' , I am using Billing Distribution Rule Work/Event , in the Control Billing by Top Task window the 'Ready to Accrue' and 'Ready to Bill' flag is checked,

i have entered the pre approved batches for Timecards and ran the PRC Distribute Labor cost, PRC Generate cost accounting Event and Ran the create accounting program

In the Control Billing by Top Task i clicked Ready to Accrue button for Top task but it's not generating draft revenue automatically

for Billing also i created manual event but when i clicked Ready to Bill 1 it's not generating draft invoice for top task automatically