Unable to login into QuickBooks

Hi,
Got a problem today, in fact nothing was there till yesterday, I am unable to login into QB's either remotely, via the Internet, or locally via the network.
The server is working fine for other programs and access.
Then I tried to restart the Server, reinstall the QB connector software but can’t get rid of that problem.

Service Internet Access not Available!
Make sure that your home server has a working internet connection and then try again, Contact technical
support if this condition persists.
