High notes not playing back on Bugle.

I'm trying to compose a piece for a bugle and a small marching band but when ever I try to write in anything an octave above middle C Musescore does not play back.

I know the Bugle has a limited range and can only play certain notes but I was fairly sure that the bugle could play all the notes in the attached file.
I really only need to be able to play the E and G above the octave up from middle C. Any help as to how to fix the problem would be really great.