Are you trying to stream through a TV/projector (coax) or through ethernet / computer?
I assume you mean computer, and in order to test, you can go here:
http://www.nasa.gov/multimedia/nasat...aram=education
and you will see the education channel. If you can see the stream, you should be ok. It will flip to the Kickoff when it begins on Saturday. If not, you could also look up the local provider of nasa channel, and try their online feed.
Remember though that if you are in a gym or something, you have to have an ethernet plug within 250ish feet, and try to avoid wireless because of the bandwidth.