NEED HELP ON DOWNGRADING FROM 4.3.5 TO 4.3.1 ON iphone4

[dtquoc]

I have jailbroken ios 4.3.1, and shsh saved it on tinyumbrella. Yesterday i accidentally update to ios 4.3.5, and now I was wondering if I can downgrade it down to ios 4.3.1? I have tried to connect it to tss server on tinyumbrella, and restore to ios 4.3.5 on itune, but it gave me a 3194 error. Can anyone give a some instruction on how to downgrade to 4.3.1? Thanks.

[iphonewarrior]

Have you modified your hosts file? This will re-direct iTunes to digitally sign your firmware from a different server.

Take a look at this Redmondpie article, reference your error.
Fix iTunes Error 3194 When Restoring / Updating To Stock or Custom 4.3.3 Firmware | Redmond Pie