nothing know how add more virtual desktops? when reboot my computer lost the changes...

what kind of installation do you have?

you have to launch obconf and select the number of virtualdesktop you want

he says "when reboot my computer lost the changes..." so i thought that he can add virtual desktops but he can't find them anymore when he reboots, which could be the case of a liveusb

i have slitaz in my hdd
i can add virtual desktop but when I reboot my computer lost the changes and i cant find the configuration file

may you post your grub menu.lst?
did you install following this guide?
http://doc.slitaz.org/en:handbook:installation

yes i was install slitaz with slitaz installer im not use usb

if you are not using an intramfs and root= is correctly set to your / partition, the only thing i can think of is a permission problem in your home directory.
is .config/lxpanel/default/ in your home directory writeable from your user?
when you add a virtual desktop in your pager .config/lxpanel/default/config and .config/lxpanel/default/panels/panel should be created. if they are not created you continue using the stuff in /etc/lxpanel which you have not modified.

this is my menu.lst
# For booting SliTaz from : /dev/hda2
#
title SliTaz GNU/Linux (cooking) (Kernel vmlinuz-2.6.30.6-slitaz)
root (hd0,1)
kernel /boot/vmlinuz-2.6.30.6-slitaz root=/dev/hda2

title SliTaz GNU/Linux (Kernel 2.6.25.5-slitaz)
root (hd0,4)
kernel /boot/vmlinuz-2.6.25.5-slitaz root=/dev/hda5


my permisson for lxpanel default is 700 but i change for 777 alla files and directorys and i have the same problem

i look the config file with my other slitaz and i dont have any option for pagers

by the way i lost changes only with my pager other changes are ok when i reboot my computer

do you share your home dir between the two slitaz?
if yes do you have the same username and uid in the two slitaz?
may you post the output of

ls -lRa .config/lxpanel/

?