Question for macro button

I have created a button to add critics in a damage macro damage. The thing is that it does NOT work. I have used the Markdown command    [Attack Roll](!attackroll) , but I can't get it to run.  here is the code of the macro /em damages with its javelin! &{template:simple} {{rname=Damage}} {{r1=[[1d6 + 3]]}} {{normal=1}} {{charname=Piercing}}  [Critical hit](!roll) I've tried to put different commands where (!roll) to execute a simple template with a 1d6 roll, but I can't get it to work.  Anybody know how it could? the pink button doesn't work :S Thx in advc. 

ok, I just figured out how to do it myself :) new code /em damage with his javelin! &{template:simple} {{rname=Damage}} {{r1=[[1d6 + 3]]}} {{normal=1}} {{charname=Piercing}}  [``Critical hit``(!
#d6-piercing) then created a separate macro with the name d6-piercing &{template:simple} {{rname=Damage}} {{r1=[[1d6]]}} {{normal=1}} {{charname=Piercing}}