Insufficient bandwidth through airport.

Hi, I'm trying to set my folks up with iChat on their iMac G5. The ethernet connector is loose and unreliable. Rather than pay to fix it, they're using airport through the wireless router to the cable modem. If you connect via a cable (and hold it just right) I can audio chat fine. But if you try to audio chat with airport, I get insufficient bandwidth. What could be different?
Thanks for any suggestions...
Steve

There could be a problem with the wireless connection in terms of signal strength, or there could be a problem with the wireless function on either the router or on the iMac G5.
Test the signal strength by making the wireless connection from point-blank range. If that's not the problem, try another Mac computer with a wireless connection or try another wireless router.

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