Drill through does not execute

Hi. I'm fairly new to Jasper Studio, and this is my first post on here.

I've created a drill through report where a pie chart then runs to a detail level, passing a paramater as it goes. The drill report opens, and the correct parameter is selected, but the report does not execute. I need to manually click the OK button to run the drill report.

How can I set it so the report runs immediately when someone clicks a slice of the pie chart?

Thanks.

Nick