I'm pretty familiar with these bad boys so ill try to help.
Just out of interest what conditions are your game in that you're testing?
I ask because I'd you are COCing into the game somewhere and then starting your quest, that can cause aliases not to fill. Make sure you're using a save game from after the Helgen start.
Also, how are you staring this quest? SetStage? StartQuest? Actually in dialogue with the NPC?
Edit:
Oh well at least you sorted it lol

yep remember to tick allow reserved. Optional helps sometimes to if its a dynamic quest. Usually if you create aliases in a script as the quest launches
