Can't connect to cable modem via ethernet

[whamboozeled]

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 would really appreciate any help.

 

[Spawn_Dooley]

Have you called your internet service provider, it is what I'd suggest as a first step because they can "see" if you are connected to their server whereas Motorola wouldn't have that ability.

 

[whamboozeled]

Have you called your internet service provider, it is what I'd suggest as a first step because they can "see" if you are connected to their server whereas Motorola wouldn't have that ability.

The modem is connected to my ISP I can access the internet via wi fi its just that my mac can't connect via ethernet.

 

[whamboozeled]

I also went & tried a different brand modem & had the same results.
The only modem I can connect to via ethernet is my old modem

 

[Spawn_Dooley]

Have you tried another ethernet cable?

 

[whamboozeled]

I have tried 3 different cables.
I have also repaired permissions.
And done a safe boot.
I even tried making a new user.
Still no luck..

 

[oldscribe]

Hi,

Did you turn WiFi off sounds silly, but had to do this on a BT system then I got the link connected message and all was fine.
Never had to do it before.