hi again i tried to upgrade bb to 6.15.00 and install cydia whit redsnow beta5 (using my actuel FW 4.2.1) i lunched whit Tethered option in redsnow got the ananas but then the iphone just restart and i get usb to itunes ;( help me out pleas

Hello ithink i screwed up my iphone3Gs, i realy would like someone help me out ,
ok i was on 4.0.1 bb 5.14.02 JB, this night updated ultrasnow to 1.2 then updated FM to 4.2.1 then used redsnow to JB it evrything went ok exept the 1st boot the iphone froze restarted and then worked fine,cydia was (whit icon) entred then reinsialized itelf after that i tryed to upgrade the BB whit the dl FW 4.2.1 using latest redsnow :s couldnt run the iphone freez on the JB icon (the one in the apple icon) tryed to reaply the JB getting wors won't finish the install of buddle :( pleas 1 cookie for help!!