Media Player 10 Question.

> I recently installed a new piece of S/W that has stopped giving me the option
> to add tracks to the current Playlist.
>
> In fact when I right click on a track and select PLAY, it opens Media Player
> 10 and plays the track.
>
> If I select multiple tracks and select PLAY, it open up the new S/W that I
> have installed.
>
> How can I get the Right Click option to select add to playlist?
>
> I am assuming this will need a registry fix, and therefore detailed
> instruction would be appreciated.
>
> Thank you in Advance.
>
>