i have changed the line /usr/X11R6/startx to /usr/bin/X11/startx because the path was wrong.
Adding a comment to the line i get this on the log file :
X: warning; process set to priority 0 instead of requested priority -10
Fatal server error:
Server is already active for display 0
If this server is no longer running, remove /tmp/.X0.lock
and start again
when reporting a problem related to a server crash, please send the full server output, not just the last messages.
Please report problems to ....
some lines without errors and the last line is
/usr/bin/WindowMaker fatal error: could not open display "home:3"