Flame arrow ?

[Strigoi1958]

only 2 challenges left. Kill a horned graug (can't seem to find one ) and kill 5 archers with flame arrows. The tutorial says get your sword/ bow glowing the press right mouse button and left Ctrl.... I do that but when I press the left mouse button it fires normal arrows ???

[Alcator]

Also, if you have the ultimate bow skill (worth 2500 money, or unlocked by a rune), if you have enough kills with the bow, you can then press "2" while in bow mode and this wil give you unlimited fire arrows for 20 seconds.

[Onetimesailorman]

In the "Spirit of Fire" quest I've killed dozens and dozens of Uruk with Fire Arrows. The quest isn't registering the kills. Why is that ?

Edit:

I've tried everything suggested in this thread. Nothing works. I get credit for the side objective. Then I shoot dozens with Fire Arrows and get no credit.

Five fire arrow kills are all you're supposed to need to complete the quest. I've even done more than five fire arrow kills sequentially. It makes no difference. I don't understand how the game could possibly think I'm doing it wrong.