'xhost +' does not work in warty

[Johannes Behr]

Hi,

I run warty on my local workstation (pc1228)
and logged into another machine in our local
network. 

On the local machine I disabled the X-access
control with 'xhost +' so everyone should
be able to access the XServer on pc1228.

When I try to start a X application (e.g.
xterm) on the remote machine with 
-display pc1228:0.0 the window should
start on the pc1228 server.

That's how it works on all kind of
X-Workstations I used in the last
years. But not on warty. I always get:

xterm Xt error: Can't open display: pc1228:0.0

Can anybody give me a hint? Do I have
to change some other access/security settings?

Regards,
  Johannes