I am unable to access content that I believe is being streamed with Lightstreamer
which content are you talking about? Are you sure that lightstreamer is involved?

Does this work on your browser? http://www.lightstreamer.com/demo/StockListDemo_Basic/

I get nothing in the streaming window and any attempt to input chat takes me to http://internet.newlifechurch.tv/live-ajax.php
this doesn't seem related to lightstreamer; please note that this is a developer-oriented forum; please contact the company owning the site you're trying to access and let'em know your issue; they will contact us if needed.