I just jailbroken my devices using evasion 1.5 few hours ago, and I realized that I did a 'restore from backup' after updated from 5.1.1 before i jailbroken my device again. Now my apps and iBook PDF is all gone, so i decide to restore it again. The problem comes : 1. Error 21 occurred, I can't even restore my device. 2. Most of the blog asking me to set my ipad 2 into DFU mode, but my ipad just won't go into DFU mode, i tried tinyumbrealla recovery mode as well, it just wont go in. It will straight away boot up my device after the dock connector appeared. Help me someone !!