iPhone software update server could not be contacted

I keep getting this error message when I attempt to restore my iPhone 4 from 4.0.1 back to factory 4.0.1.

I've tried reinstalling iTunes/Quicktime but the problem still exists.
The problem has been going on for over 3 days, I'm sure it isnt my phone.

Any experts here can shred me some insights?
Thanks.

 

help please.

 

hi, i cant seem to complete the step where i have to add a hash + space.
it wont allow me to save the file.
it says the access to the file is denied.
ive already gained ownership and permission granted for the folders and host file but it still says access denied.

im soo close!!!!
thanks for the reply, but i still need to complete this!!! so close

 

help please!!