🚀 go-pugleaf

I have a G3 in my room and in the room next door we have a Performa 5300
and an HP 4M Laserwriter. All three are connected via Appletalk.
Now, when I start my G3 up, with both other machines turned off, as soon
as everything has loaded and I can see my Desktop with all my drives, I
get following message: "File Sharing could not be enabled". I have the
File Sharing Control Panel turned off, because I use the Perfoma as
Server. Both the File Sharing Extension and the File Sharing Library are
activated. If I turn these off, obviously I don't get the message 'cos
File Sharing as such isn't active. This problem hasn't been around
forever and I can't remember how I got rid of the message last times.
Has anyone got an idea what is causing the problem?