problem with d.mon

Hello,
I have a problem with graphics monitor.
I recently have changed motherboard and video card and installed a new version of Xfree86 (3.3.2 on linux 2.0.29, Slackware 3.2). Grass4.1 starts without problems but graphics monitor doesn’t work. When I run d.mon start=x0, it gives me the following message:

X Error of failed request: Badmatch (invalid parameter attributes)
Major opcode of failed request: 78 (X_CreateColormap)
Serial number of failed request: 78
Current serial number in output stream: 79
Please start graphics monitor
Error - Graphics monitor not running!
Problem selecting x0. will try once more…

I’ve tried to install grass again but with the same results.
Any help appreciated.
Thanks
Valerio

Valerio Noti
geologo
valsil@etruscan.li.it

Valerio Noti wrote:

X Error of failed request: Badmatch (invalid parameter attributes)
   Major opcode of failed request: 78 (X_CreateColormap)

The X display is not in 8 bit colour mode. Find what mode it is in
by running xdpyinfo. If it is in 24 bit mode, then use the 24 bit GRASS
display driver.

--
James Cameron (cameron@stl.dec.com)
Digital Equipment Corporation (Australia) Pty. Ltd. A.C.N. 000 446 800