xfcepanel and taskbar autohide options

[hicham]

Hello 
    I use the autohide option of xfcepanel and taskbar to hide them so
I can see any application on the whole screen, xfcepanel and taskbar
are located at the bottom of my screen
the problem is that sometimes xfcepanel get hidden forever, gettin the
mouse pointing on the bottom screen line  does not make it reappear. I
have to switch off and on the autohide option
to get it on screen again 

Thanks