iphone 4s jailebreaked stuck on apple logo

hi
i had ios 6.1.3 jailbreaked with evasion on my iphone 4s. i installed **** from cydia and then iphone retarted and stuch on apple logo. i tried to restore on itunes to many ipsws like ios 6.1.3 or ios 7.0. but error 3194 is shown on itunes and is not restoring. what to do plz help..plzzzzzz