Sharing music through a sound system and on zoom

[Gaynor1966]

Please help I have a new laptop windows 11 I used to be able to share my music from the laptop to the speakers at the venue using the sound system through an amplifier now when I share the music the laptop comes up with a few options line in speakers headphones etc I select speakers music works I put zoom on computer sound shuts music off any ideas ?? What am I doing wrong ?