Now that you have a NewsGroupHosting.com site, there are a few things you need to do like adding discussion topics and giving details on how and who can access your site. Use this guide to get you started.

http://files.messagepixels.com/NewsgroupHosting.com%20Administration.pdf

The MessagePixels MPNews software help file has several details that are referenced in this document.  You can get the help file here: http://files.messagepixels.com/MPNews5.chm