Where in the pane. I uploaded a capture. I cannot click in any of the spots and hit a single letter and get it to jump.
You have numbers in all the wrong places.
For example, if you click on the word "Acoustic" in the "Genre" column and type G MC would jump to the first Genre name starting with G. If you click on "2 live Crew" in the "Artist" column and type G, MC will jump to the first artist name beginning with G. If there isn't a name starting with G, MC will not jump at all.
Here's the concept: MC interprets a keystroke in terms of the UI element that has focus. That's a Windows UI convention. If the focus is not on the right pane column, click in that column to put the focus there.