I gather you used Unrevoked to root? Red triangle means that you need to plug your phone in to a computer and access recovery through adb. If you rooted using that long method in the sticky, the phone can go into recovery without adb. And Ive also read that clockMod isnt that stable or a recovery because it cant wipe correctly. You may also want to flash AmonRa recovery. It will be a lot easier in the future.
[TUTORIAL/HOW TO] Basics of ADB - xda-developers
Its all in that first post