MasterFunk

I tried that but when i click on the On button next to Active it doesn't change. It just stays blue and won't change. Any suggestions?

Hey I'm trying to make a fire sprite system that i created appear in the choreography during the middle. I dragged it into the CHO window at the frame i wanted it but it apeared at the beginning of the CHO. How can i make it disappear until the frame i want it at? Thanks for the help, MasterFunk