How to Cancel the task to delete the rule submitted for approval in sap infosteward

Hi All

     I created a simple rule and I want to delete it now.But upon clicking the "Delete" Button in  SAP Infosteward tool its showing the following dialog box

How do i do it? I went to "My Worklist" ,but there i could not find any icon to cancel that rule. I went to "Task" Icon present in the sidebar, there as well upon selecting the type as "Rule task", it was all empty,Please provide a solution to all these