Real-time (automatic) doesn't advance

When the note-iput mode 'real-time (automatic)' is activated, the score should keep going until you release the note or play another one (at least, that's how I understood the workings of this), but that doesn't seem to work with me... The score doens't advance automatically. Anybody who knows how to fix this? What am I not doing right?
If you need to know more, ask away!

Thank you,
Matthias