Unable to update iPod Touch 3G to iOS 5

Hi,
I hope it’s alright to share my problem with you. It occurred when I tried to update my iPod touch 3G to iOS 5. Everything is pretty ordinary, as I have SHSHs for roughly any FW for the machine. I’m not sure how to explain it, but I was successful with upgrading or downgrading to almost every firmware which I tried. Unfortunately, I was not successful with the iOS 5.
I tried several times but each time it shows this error message “3194”. If I continue to refresh, it gives me “3002”. To my knowledge, I’ve tried everything I can. I look forward to your kind support and help on this issue. Thanks in advance.
