please help..

my friend iphone 4
ios : 4.2.1 Jailbreak
already save shsh blob 4.2.1

wanna upgrade to ios 5.1.1 & jb

problem
1.cant upgrade/restore 4.2.1 to 5.1.1 from itunes --> error 3194
*apple / itunes server already close any upgrade to 5.1.1
i. already try #74.x.xx --> error 3194
ii. already on DFU mode and restore ipsw 5.1.1 --> error 3194

any solution?