I've recently added a Linksys EtherFast Router/Switch to my home LAN and would like to use full duplex between it and my A4000T. I have tried putting "DUPLEX=FULL" in the MiamiDx MNI driver settings, but it does not work (i.e. the full duplex light on the Linksys does not come on). Any ideas what's wrong or what I can try