Certain Soundfonts are silent

Certain .sfz from the SSO soundfont do not function. I exported everything how I was supposed to, however some of the instruments, more specifically the ones I'm using right now: Keys - Grand Piano, and all the Strings - Violin parts, including 1st Violin Sustain, Pizz, and Staccato, and 2nd Violin Sustain, Pizz, and Staccato, and the Percussion, in my case the Snare and Bass drum, though the violin solo works, and the cello parts work as well, along with the Timpani.

When I select either the Piano, Violin, or Bass and Snare parts from the Mixer, after installing them and adding them with the Synthesizer, the playback for those specific parts are silent, while if I switch to other piano and violin parts, it functions fine. The volume bar in the synthesizer doesn't move when I click on the notes in the piano score, but does when I click on the notes on the Timpani score, or the piano score when I have something other than the SSO piano selected in the mixer.

This happens with every score that I make, and happens regardless of the number of soundfonts loaded in the synthesizer, and also regardless of the number of instruments.

The attached score is the score that I noticed this on, however again, this did happen on any other scores I opened up.