I need to unjailbreak but 1394 error won't let me?

I've tried everythinng to avoid the error i used tinyumbrella and edited the hosts file and turned down the firewall but nothing it always keeps popping up is there another way please help i have iPhone 4S IOS 5.1.1

Look up how to reset your iphone, you reset it like this:
Turn the device off
Hold the sleep/wake button and home button at the same time for at least 15 seconds.
This does delete EVERYTHING on your phone but an other option isn't there i'm sorry.

Http://lmgtfy.com/?q=how+to+unjailbreak+an+iphone