multi waitingroom getmapusers HELP

[EL Dragon]

here is my problem

There are 4 maps,each map is displayed with a 0....

 

but it will all be together only one 0

 

 

this is my waitingroom script

waitingroom " Test [ "+getmapusers("custom_fild01") + getmapusers("custom_fild02") + getmapusers("custom_fild03") + getmapusers("custom_dun01")+" ]",0;

[Emistry]

waitingroom " Test [ "+( getmapusers("custom_fild01") + getmapusers("custom_fild02") + getmapusers("custom_fild03") + getmapusers("custom_dun01") )+" ]",0;

you mean add all value together ?