Iphone ios 7 downgrade problem fix?

I updated my phone to ios 7 beta 4 iphone 4s a while ago and now i want to downgrade back to 1.6.3 but It doesn't work! I downloaded 1.6.3 and tried going into recovery mode and shift clicking restore to downgrade my phone but it says

"THe iphone "… " can't be restored at this time because the iphone software updaqte server could not be contacted or is temporarily unavailable."

I tried restoring to factory settings and that didn't work either.

You need to register your device's UDID with a developer account through a site like http://www.udid.in/.It's $5, and they literally registered my 4S instantly.