History - Actions Reschedule Problem

Hello Everybody ,

My problem is that , I want to make changes on report , schedule settings format and destinations For example I want to remove or add person mail.

Firstly , I choose the report I want to make changes , Right click , History , Reschedule , Changing settings.There is no problem this far. But endly I select schedule , The report is starting .I don't want to starting report automatically . After making changes to report automatically sends mail to people.How can I solve this problem ? Please help me.