DSL EARTHLINK SPEEDSTREAM ISSUE

I’ve installed a speedstream 3060, I have earthlink as my ISP. My os is win2k. The dsl modem shows that it sees the dsl, but everytime i try to connect to the internet, it tells me there’s a problem with my modem. The earthlink also won’t work when I try to use the dial-up, I’ve had to use my netzero dial-up, which will only work when the dsl modem is unplugged. And I’m really not sure how to resolve this.
Any help would be greatly appreciated.
Thank you.