Trying to jailbreak my iPhone 4 on 6.1.3... ran into a big problem... HELP

I'm new to jailbreaking, and am trying to do this to my iPhone 4. I've tried other iOs firmware, and they didn't work... so I tried the iOS 6.0 firmware, and now Redsn0w is stuck at "Uploading first stage" and my phone is still stuck in DFU mode, but the screen is blank, and I can't turn my phone on at all. How long does the first stage take to complete? It's been at least a half hour...

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