Set a private group with TNMNNTP component

Hi,

    I have a problem with my NewsGroup connection. I want to select a
private group and I have the transaction reply: 480 logon required. I
entered my UserID and my PassWord in the TNMNNTP properties but it did not
work. I have a message : Invalid Group.

    Do you know how to fill the logon for a private group?

Thank you in advance for your help!

Isabelle Tremblay