Registration of players on mysqueezebox.com

Hi,

I'm sorry if this is a trivial question but I've been at it for past an hour without any success. I am using Logitech Media Server on a Debian-based distribution running the official Wimp-app for streaming to several Squeezelite players on Raspberry Pi's around the house. On mysqueezebox.com, however, there is only one registered player making it impossible to control the settings from mysqueezebox.com. and I cannot seem to get it to register the other players. The players are all rPi's with identical raspbian distribution and setup. Is there a special trick to this and why are the players not registered?

Thanks in advance for any suggestions/comments
/Thomas