If it says too big custom face blahblah out of 0kb that means that your server doesn't accept custom faces.
You need to change the server stuff so it accepts custom faces.
There are certain custom faces that work though, not exactly custom, but there are some faces in ArmA 2 that are accepted in DayZ. Glasses too. Edit your player CFG and change the Face and Glasses to this:
face="Face98_camo4";
glasses="Delta_glasses";
Your guy will have a camo face and some pretty boss looking Delta shades.