Airport Utility in Lion can't see Airport Express

Hi, I am using my 13 inch Macbook to set up a home wireless network. I have a base station downstairs and an Express I am trying to use upstairs to extend the network. I was setting up the network and everything went great. Then I went back in to change the name of the network and now the Airport Express is not visible in Airport Utility. I have no idea why. It was fine one second and gone the next. I have reset the Express several times and tried connecting it to my computer via an Ethernet cord but nothing it working. I just resently installed Lion but that was not a problem when I originally set everything up the first time so I don't think that is the issue. Suggestions?

Step 1.. get the proper utility.
http://support.apple.com/kb/DL1482
AU v6.1 is useless.
Step 2.. Plug the TC directly into the computer by ethernet. You might need to press reset to get it to appear. Setup in bridge mode, which I presume is how the old one was setup.
Is the AEBS the main router in the network??
If not the TC should be plugged into the main router and put in bridge.

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