Are you using the web based news groups? If so see this page for
help...
http://www.microsoft.com/communities/guide/newsreader.mspx
If not and your using Outlook Express as your news reader you can
use the "Reply Group" button in the "Toolbar". If the toolbar is
not displayed go to "View -> Layout" and check the Toolbar checkbox
then click on Apply. When you reply make sure you have the message
your replying to open. You can get more help for Outlook Express on
the microsoft.public.outlookexpress.general news group.
If your using a third-party news reader consult the users manual or
support web pages for help...