I just jailbroke with the .9.9b9d Redsnow on an iPhone 4 running iOS 5.0. Cydia rebooted the phone and now I can't get it into DFU mode. I have tried many different combinations of holding the power button, both home and power buttons and just the home button to get this thing into DFU mode. I can get it to either stay black, with the Apple logo, or with the connect to iTunes logo. I can't get it to show me a power off slide. Does anyone have directions on how to fix this?