hey my iphone 4 turns on after going into dfu mode and when it says exploiting with limera1n. then when i restart it and try to go into dfu mode again it just turns off and when i turn it back on my pc wont recognize it so i have to restart my pc. please help thanks ps: im on 5.0.1 and it has been jailbroken before and dont say im not doing dfu mode right cause i have dont it before