Can't access the Internet from Mac OS-X using a D-Link DWL-2100AP access point.

I'm running Mac OS X version 10.5.7 I and I can connect to the network via the AirPort, get a DHCP address and connect to all machines on my local LAN, but I couldn't get pastthe router.

Finally discovered here that the Dlink router has an option for a "Multimedia QoS" setting. After disabling it I was able to access the Internet.