Middle mouse button not working

[Staf Verhaegen]

Hello,

I have a compaq PC with Win2000 on it with a scroll wheel mouse.
When trying clicking the middle mouse button nothing happens. Scrolling with
the wheel mouse does scroll the window in a mozilla window running on a remote
linux machine.
In the mouse configuration from the control panel I tried with different
settigns for clicking the scroll wheel: double click, unassigned, middle
button but non of them give any change on the behaviour of.
I have the latest version of the X server available trough setup.exe 
(4.2.0-42) and use the following command to start the X server:
X -query numerico -fp tcp/fontserv:7000 -fullscreen
(Also started without the fullscreen option but this doesn't make any difference)

greets,
Staf.