TOPIC: Some Keys Don't Play Despite Having Samples

I'm attempting to make a soundfont from scratch. It was going well until I was testing it out in a DAW (the one I'm using is LMMS) and all the notes past A#2 won't play the sounds I've assigned to their respective notes. Currently I have up to D#3.
Is this maybe because the soundfont isn't finished? Is there some other problem?

If you can't add the soundfont: you can at least add a screenshot of the instrument window of the relevant instrument in the instruments section.