I am trying to unroot my evo 4g. It now says S-on, however I switched to amon ra 2.3 but it is still rooted as I still have superuser and can run root only apps and still have amon ra on the phone. I can't figure out how to get back. I tried to run PC36IMG_SuperSonic_GB_Sprint_WWE_4.53.651.1_Radio_2.15.00.0808_NV_2.15_release_209995_signed but it does not give me the option to update. What am I doing wrong?