Digital TV has shut down your TV.
This web site will help you-
http://www.antennaweb.org/aw/Welcome.aspx
Did you get a converter box? If not you have several options.
1. Find a simple converter box. Best Buy still carries some. Other vendors might also.
2. Failing that, there are several DVD/VCR combo units that have a digital over the air tuner built in.
3. Both Tivo and Channel Master make DVR units with digital over the air tuners.
4. Any new HDTV will have a built in digital over the air tuner.
You can use these two sites to get an idea of what you should be able to pick up:
http://www.antennaweb.org/aw/welcome.aspx