how to fix error message "the iTunes update server could not be contatced"

What is the cause of error message

"The iTunes update server could not be contacted. Please check your internet connection or try again"

I have set SSL 3.0 to on

used the itunes diagnostic to check internet connection and the reoprt is

Network connectivity

Network interfaces verified OK

ITunes Store connectivity

Internet connectionverified OK

Secure link to iTunes store failed Red dot= NOT OK

deleted the SC file in SC info directory no success.

Any Suggestions

searchin for an answer