CCpulse threshold for created groups

Hi,
I need help again!!

I had created template from virtual queues. Then I wanted to add a new stat group, so I create a new formula that name is answering rate ( Total_Answered/Total_Total_Entered*100) Now on I will follow this statistic. But I can set a threshold for all of statistics but I couln not set for answering rate. Cant I set threshold for groups which I had created formula?

I tried these threshold:

  1. if Threshold.StatValue < 70 then
    Threshold.Result = true
    end if

  2. if Threshold.StatValue < 70 then
    Threshold.Result = true
    else
    Threshold.Result = false
    end if

Thanks..