John I ended up with a "AppleCare Senior Advisor" who went through more tests with me and my iMac and Airport Express. What he found was my Airport Utility on my iMac 2011 was not compatible with my 2008 Airport Express. I could go to the iOS App store and get an older version of Airport Utility and try to set the Airport Express up with my iPad, he said, or I could get a new Airport router.
I don't know if that is really the problem, however I got sick of nearly 6 hours of phone calls to Apple that I decided to bite the bullet and buy an Airport Extreme, which BTW is not really compatible with my iMac. The new router supports AC technology instead of wireless N. Meaning the iMac would only connect to a 2.4 network and not the 5 as my 2011 iMac does not support AC wireless technology.
This may be a case of planned obsolesence in order to reap more profit from the consumer, but at least I now can stream video from my iMac to the Apple TV etc.
The next real battle is going to be the loss of Net Neutrality.
Thanks for your looking into this John, it is appreciated.
greg
Oh ya, one more thing...I still have that exta network "out there" and nobody can figure out how to shut it down. So I have the new network and an old one that we could not get rid of with either router.