Can't connect to modem using ethernet
I am on a power mac g5 running 10.4.11.
I just got a new modem Motorola sbg6580 & I can't log in to it via ethernet on my mac, It doesn't even see it.
I can log into it using an even older mac and a pc, but my current mac I have no luck.
I can unplug from the new modem & plug into the old modem Motorola sbg900 & it see's it fine, so it is not a bad ethernet cable or port.
I called the Motorola tech support & they are stumped too.
I also tried another new modem with the same result.
When connected to a new modem if you look under system pref, network, ethernet, it says ethernet cable unplugged.
I deleted all locations & made a new one, but still no luck.
Any help would be appreciated.
PowerMac, Mac OS X (10.4.11)