Chances are you have not configured a codec on the router's VOIP dial peer. By default, IOS will use a G729 codec, but Netmeeting does not support this codec type so the codec negotiation will fail. You will need to specify a G723 or G711 codec under the dial peer that points to the Netmeeting client PC, and select this codec type under the netmeeting configs as well. The call from Netmeeting to router works as the router will accept the codec Netmeeting is suggesting.
It is possible Netmeeting does not like the configured packet size of 220 bytes. Set it back to the default of 20 bytes and see if this works. You can then gradually increase it and see what the maximum value is.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.