error 815 connecting through WAN miniport (PPOE)

I've just begun using my new laptop and have encountered a problem. I've set
up a wireless router, use a cable modem and both are working great. Now, when
I go into Ebay the "Connecting to Broadband" Error 815 . . . . appears. I
close it down and in a minute it reappears. I have now idea what is going on.
I'm connected with no problem through my wireless router and have no idea why
this is happening, I do have a modem (for dial-up) installed on this computer
(it came that way) but have no reason to active or use it.

How can I disable this? Thanks!!