An event raise twice when click the button.
 

Hi ,
I created a Command bar with two buttons.Both have a uniqe Tag value each
time the bar is created. When I install this add-in in my developing machine
it's work great. But when I install it in another machine I see that when I
click one of those buttons the mailItem_Close event raises twice and it
cause problems.
I don't understand the reason it raises twice.
Can you help me to solve this problem ?

Thanks,
David