Ive been using a DoT macro for my arc in the game for awhile now. I leveled to 26 and received Bio II. Here is the macro im trying to use

/action Miasma
/wait 2.55
/action Thunder
/wait 2.55
/action Bio II

Now When i had just Bio in there it worked like a charm, now since ive added Bio II it is not casting on any enemy NPC. Am i doing it wrong?