How long does it take to jailbreak iphone 4?

I'm using redsnow from this website http://www.jailbreaktech.com/redsn0w-updated-to-install-cydia-on-ios-6-download/ to jailbreak my iphone 4. But its taking forever to download jailbreak data onto my phone. Its been like an hour! How long should it take?

When I downloaded the jailbreak for my iPhone 4, it took 3-10 minutes. Make sure you downloaded the appropriate type of firmware as I noticed that was a problem with my friends iPhone and that is because I have a GSM iPhone and she had a CDMA iPhone