Quote Originally Posted by Verbannon View Post
Benefit: While wielding a melee weapon in each hand, you gain a +1 bonus to the damage rolls of weapon attacks that you make with a melee weapon.

You have to hit the enemy with the melee weapon to get the bonus according to the feat. So it will only work with powers with the weapon keywords as those are the only ones in which you are actually hitting the enemy with your melee weapon.
Ok thanks, I didn't see that last part. Sorry for asking a stupid question.