I have an Iphone 3GS firmware 3.1.3,jailbroken by spirit.I want to upgrade to firmware 4.0.1 but I keep getting an error 3194 whenever it tries to verify the update.I've already saved the SHSH blobs to cydia and edited the hosts file(I'm not sure whether to add a "#" before the "74.208.10.249 gs.apple.com" or not) but it still gives me that error.Please help!

Thanks in advance!