Thanks for your help.
After doing a complete reset, I was able to set up TC and I got a big check mark saying that the Set up was complete. But still no internet, even with a green ligght on the TC. But this time when I clicked to find out the problem I got a dialogue box asking for an ip address and DNS servers. I have never been asked for those before either for the 2 Expresses or 2 Extremes that I put on my network. I went out to the Cisco site to see if those numbers were there but I could not find them. I guess I have to call the isp which is Cox and that is usually a big nightmare.
Thanks for your help. (BTW, I unplugged and replugged both my modem and my TC without success).
I haven't had TOO MUCH difficulty with Cox configurations. I suspect you may have had some wrong options doing your setup. Here is the problem, we don't even know what your topology looks like, or what you even intended.
So you still have the original extreme? The TC has its own extreme, so do we have both on the same network? How is it laid out, and what options did you give the TC?
So many unknown variables here.
Thanks for all your help. You all pointed me in the right direction and it took a call to AppleCare to walk me through what I was doing. The "problem" was we recently upgraded to a bundled package from Cox so that the modem was used for internet and telephone. When I unplugged the modem to reset it, the battery for the telphone prevented the reset. Several calls to Cox finally got them to do a remote reset and everything worked immediately after the reset. Just like I expected when I started the process.
And all of the reading that I did in researching the whys of everything I was doing (and not doing) gave me a tip for making that initial back up fast -- using an ethernet cable rather than relying on wireless (for the initial BU).
All is well. Thank you all.