You can't use both ports on the modem at the same time. The PC is probably
setup to authenticate using PPPoE and is connected through the USB. Your Mac
is obviously setup to connect using PPPoE on the ethernet interface. It
cannot detect a PPPoE server because the PC is connected. You would need to
setup the modem (router?) to perform the PPPoE part and, assuming it is
capable of this (you don't mention the model) perform NAT and DHCP. You
could then plug it into a switch via the ethernet port and have both the PC
and modem plugged into the switch via ethernet. Both machines would then
need to be set to get IP address's via DHCP. If your modem is not a router
then you will need to get one, there are many combination modem routers,
some with a built in 4 port switch will allow you to connect up to 4
machines to the same internet connection.

It may be helpful for you to do some reading. There is much self help
information on the net. Otherwise there are people on this list who setup
these things for a living.

Try here http://www.ozcableguy.com/index.html

And here

<http://forums.whirlpool.net.au/index.cfm?a=wiki&tag=DSL%20Modem%20and%20Rou
ter%20Guide> 

HTH Rob


On 5/12/05 8:14 PM, "Peter Bull" <[EMAIL PROTECTED]> wrote:

> I have just connected to Optus ADSL. They say that they don't support
> Macs but that "Macs are very easy to set up" and that they work on the
> Optus system.
> A PC has been connected via the DSL modem USB port and  my eMac
> connected through the ethernet port. The PC works fine but on the Mac I
> always get the message "Could not find a PPPoE server".
> Has any one on the list had this problem and what is the answer??
> 
> Thanks,.
> Peter Bull
> [EMAIL PROTECTED]