I have SHSH saved for version 4.2.1 but when i try to make jailbreak with 4.3.3 my iphone stuck on black dfu mode. So i'm trying to restore using tinnyumbrella to 4.2.1. When i try to restore i have the error 1013. If i try to put 4.2.1 with jailbreak (snowbreeze) the process goes to the end but still in the black screen dfu. I've tries to use fixrecovery from tinnyumbrella without success. Some idea to get my phone back?