OK, with your help I eventually found the problem - Zone Alarm Firewall.
Under Application Control - View Programs - Bit Che - besides allowing the 4 settings to Allow - Outbound Trusted, Outbound Internet, Inbound Trusted and Inbound Internet, I also had to click on the Options and change the Serurity, Trusted Level and Send Email settings as well.
Haven't rebooted yet but I'm sure everything will be OK.
Thanks for your help and for a very good program Chip.