only 3 of 4 diablo clients start

Hi
just got the 7 free days trial looks very nice ,atm im stuck
i run 4x diablo ,3 of 4 are loading fine only last never load i change many stuff new name etc but semms like i only can run 3 clients
anyone know what i do wrongß

edit:funny is if i only run slot 4 it wont run even (
edit2:somehow its work now just made new layout