basic ratings help

[dbpass]

This is really stumping me. I can't get ratings to persist for any files.

I click a star to rate a song in the main window and the star becomes illuminated.

But when I play another file and click back onto the rated song the rating is gone.

I turned on "save ratings to file", but still the same thing happens.

If I right click on a playlist and click "Rate Items" and select a star nothing happens at all.

I'm sure I'm missing something very obvious, can someone help? Thanks!