Paul, I have used MS NetMeeting with some success, but I too have some problems with sound breaking up now and again.
Common problems described on Netmeeting website are mostly sound card related (half v full duplex) and firewall. Have you tried temporarily switching your firewall off to see if it clears the sound problem? Make sure you switch it back on again soon afterwards - I get attempts to attack my computer (mainly via S.Korea) several times a day!
I will be at my computer from about 14:30 to 16:30 today - I will U2U you my IP address and you can try connecting with me if you wish - at least that way, you would know if the problem was at your end or your Dad's end.
Cheers, Chris.
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