Attempted jailbreak ! Help

Hi
Attempted to jailbreak my iphone3g 4.2.1 without success and now the phone won't boot up or when connected to my pc with iTunes nothing?
Can someone please help

Plug phone into iTunes keep both fingers on home and power button until iPhone is detected, restore, then rejailbreak

Thanks mate, I've tried redsnow and green poison to jailbreak but hasn't worked, it sounds simple enough but the phone just keeps saying try again

Make sure you run the jailbreak program in administrator mode.

It happened to me too . U need a iMac to kick it out of recovery mode for some reason that's the only thing that worked for me with my iPhone 3G after u kick it out on a mac u shud b able to do the jailbreak. I didn't risk doing it.on pc but rather I've done it on a iMac .I hope this helps

U dont need an iMac, just restore to factory in I tunes then rejailbreak, it will wipe everything but I'm sure it will work.

Make sure you backup your iPhone in iTunes before choosing to restore. Then run your backup to put everything back on the iPhone and then Jailbreak. Administrator mode does need to be used if on a Windows computer.

Believe me I've tried restoring but iTunes didn't even recognise my iPhone 3G that's why I had to do it on iMac

Try this.. Plug iPhone into iTunes, hold home and power button until it is recognised, let go of power button but keep hold of home ...

Thanks mariouk your suggestion worked, now I right clicked on redsnow and fr,om the drop downtown menu selected "run as administrator " but still didn't work am I doing this right or wrong???

He's trying to jailbreak an iPhone 3g....not an iPad. Don't worry. I got your back.

I hope your problem would be solved till now, but to be true, what actually attracted me was the title of your post which seems to be a call for the help for a real Jail-Break!