****Jailbroken 3g on 4.2.1 Help!!!!

[timbales1]

I have a iphone 3g that was jailbroken and on 4.2.1 with 6.150.00 baseband. It was operating fine until I tried to reset all contents and setting and then tried to restore. I am stuck with the connect to itunes. I've already tried re-installing 4.2.1 firmware and tiny umbrella because Im getting error 1015. Does anyone have specific info to completely walk me thru the process?