Gtk-WARNING **: cannot open display: :0, Maximum number of clients reached
 

Maximum number of clients reached
(gwenview:18513): Gtk-WARNING **: cannot open display: :0

slackware 64 14.1 kde

I can not open other programs when i run three of it.
if i run dolphin, pidgin and seamonkey i can not open more.
Or if a use skype i can not open other windows and programs

i use this but i dont know whats next
netstat -an --unix | grep X11-unix
and also
lsof -p `pidof X` | grep socket | wc -l


nothing happen.

my temporary solution its reboot the system many times until the kdeinit want to work.
other thing is not always run programs, ,any times dont run anything, just desktop.