graphic ssh connection

[belahcene <belahcene@iap-cu.dz>]

Hi community,
I want to log on remote machine with ssh, the doc said that I haev to 
use the -X, but it doesn't work like this? Is there a special 
configuration of ssh ? In the past with the redhat ( 7.3, 8.0 ...) I use 
to  disable the display with xhost +, here neither -X nor xhost give the 
posibility.

when I connect to remote machine running knoppix (3.7  based on sarge) 
it works correctly
but  not to standard sarge. this is an example of answer:

~$xhost +                                                 
---------------------> local machine machine
access control disabled, clients can connect from any host
~$ssh -X -l user1  172.19.5.46              ---------------------> 
remote machine running sarge
Password:
Linux 000102F1658B 2.4.27-1-386 #1 Fri Sep 3 06:24:46 UTC 2004 i686 
GNU/Linux
Last login: Fri Mar 18 11:23:58 2005 from 172.19.130.5
user1@000102F1658B:~$ lyx
lyx: cannot connect to X server
user1@000102F1658B:~$ 

While if I connect to a machine running knoppix 3.7 ( base on sarge ) it 
works, even I omit xhost +

thanks for help
best regards
bela