You can put * instead of 0. (This is what I do). Does it solve your problem?
on *:dialog:fileserver:init:*:{
did -ar fileserver 13 %trigger
}
//EDIT:
Now when I'm looking on your script I see that there is no space after the last ":"
If should be:
on *:dialog:fileserver:init:0: {
did -ar fileserver 13 %trigger
}