I installed Z4root. I have essentially nothing else running. No security programs or anything. First time I ran it it just got stuck on the "running exploit" screen. Since then I've rebooted and battery pulled several times. Now when I run it will hang on the Running Exploit for a good 3+ minutes and then gets to "obtaining shell" or whatever that says and then after about 15 seconds of that the program closes and I'm back to the home screen. Ideas?