Lord of the rings and Fabion......Thanks, it now works, hurrah!!!

Problem was with BT Voyager 2000 Modem. Solution is:

1. Launch BT Voyager Control Panel
2. Click Configuration from menu
3. Click Security (Will ask for log on details here)
4. Choose Advanced (for security level)
5. Click 'between WAN and Primary LAN
6. Click Configure button
7. Click 'Create a new filtering rule button (You need to do this twice, once for TCP and once for UDP)
8. Choose TCP from Protocol Type drop down box
9. Type 6346 in Port range for both start and finish
10. Click Apply
11. Repeat steps 7-10 this time choosing UDP from Protocol Type drop down box

And voilla!!! (Don't forget to click Save Configuration on BT Contol Panel Menu).