Midi Trouble

Yes I’m a midi noob, and this all worked fine before, but now:
I don’t know if I accidentally changed something somehow or what, but now renoise will only allow one key to play from my controller at a time with VST’s and external synths. If I play a chord, only one note will play and if I’m holding a note and hit another, the last one cuts off.
FYI with samples it works fine though and I can play chords.

So, I’ve probably got something set wrong, but I can’t figure out what it is.
Any ideas?

It just changed recently but I have no idea what happened.

Try enable this button on top left?

LOL. Pardon my retardation. Thanks, that did it. :)