How to disable LMS from Twonky?

yesterday I installed LMS on a new Macbook pro to use as a 'server' with a Squeezebox Touch.

at the same time the laptop/ server is appearing as a 'Library' in the app for my Cambridge CXN Media player. I do not want the Cambridge CXN app to be connected to the laptop LMS.

I am looking at settings to disable this- not sure if the settings should be changed in the macbook softwatre or system prefs, in LMS web interface or in Twonky settings. So far I have not found the way.

Any light anyone could shine on this?

thanks

TOm