Have you tried to add break point somewhere before the loop to check if event is firing? If yes did you try to place breakpoint on the loop and check the value of array you feeding in? 
Edit: Also need to check if the cast is not failing.
Have you tried to add break point somewhere before the loop to check if event is firing? If yes did you try to place breakpoint on the loop and check the value of array you feeding in?
Edit: Also need to check if the cast is not failing.