I jailbroke my iPhone 4S yesterday with the recently released GreenPoison release. All was well and working until I installed the wrong Dreamboard Theme that made my iPhone inoperable but still functioning. I went to restore it to the backup I had made yesterday but when I go to iTunes all I receive is an error 21 telling me my iPhone cannot be restored. I've tried reinstalling iTunes. I'm unable to enter DFU mode. All my screen shows is the "Connect to iTunes" graphic. PLEASE FOR THE LOVE OF GOD HELP ME!