Default Mega SCH-R960 root

Hi guys.In need of a bit of help. Im trying to root a USCellular Mega SCH-R960. I've tried Kingo and the one click root for the SCH-R960U (off this site) and failed on both. The one click got stuck on the "waiting for phone to appear" screen.
Is the phone different enough to cause this to fail or did I do something wrong? Debug is on. One thing I noticed on the ATT phone was you had to press three buttons to go into download mode. Is this the part I skipped?

Thanks for the help.