Adding Damage to a token action

Hi there! Setting up a Death Knight for a campaign I am working on and when I add the Hellfire attack as a token it only list the description but not roll the damage ((10d6) fire and (10d6) necrotic). Obviously I can add "/roll 10d6" twice but how do I keep that from my players because if I put "/w gm /roll 10d6" it tells me that there was an error with the formula. Ideally what I would like is for it to appear like a normal attack listing both damage and damge type.  Thanks in advanced!

In the upper right hand area of the character sheet tab of your npc sheet, there is a gear which opens settings.  Scroll down to this section and set according to your preference. 

Sadly that makes no difference

With everything in the section that I mentioned above set the way you want it to come out, do the following: 1 Click an attack on the NPC Character sheet. 2 Click in open chat window and up arrow. 3 Cut the entire contents that appear. 4 Paste into a new ability on the attributes and abilities tab on the NPC sheet. 5 Name and save the ability. 6 Drag said monster to the tabletop. 7 Click on it's token. 8 Trigger the button which was created. It is important to note that the ability we have created by doing this was created with the settings as they were at the time the ability was created.  Changing the settings does not change the ability.  To do that, we'd have to overwrite it.

That was the first thing I did but unfortunately this won't help in this case because all that happens when you click on the ability in the character sheet it just regurgitates the text box without any rolls.

*smacks self in head* The command I needed was /gmroll. Whilst it isn't a perfect solution it will do for now