I have temporarily swapped my ADSL for a modem which, of course, bypasses the router and firewall. This has made no difference in that I still cannot instigate a call so I think that the problem is probably not within my own computer.
Sorry if I get this wrong, head hurts - you still cant instigate a call with the modem ... doesnt that imply it *IS* within your own computer, and not with router and firewall?
J