port used by cslistener

Hello,

I'm trying to use an evoque flow radio to access the music on my mac. I created a server, but then the radio can't connect because it is supposed to use port 9000, which is already used by "cslistener".

Question 1: anybody knows what "cslistener" is? (not a lot of information with a google search)

Question 2: how can block "cslistener" and use port 9000 to connect my radio?

Thank you all