To clear up most of the frustrating confusion:
1.) You need to be a Flame corporal.
2.) You need enough seals for your next promotion.
Once you become a Flame Corporal the quest becomes available but, yet she tells you that you don't have the Gold Scales. Make sure you have enough seals for your next promotion and ask for a promotion to Flame Sargeant. Now she will tell you that you need to do the quest "Gore a lizard, Hurry" before you can be promoted and she will give you the Gold Scales. Now you can do this quest and get your next promotion after you have completed it.
Edited, Dec 19th 2011 3:14am by Siros
Edited, Dec 19th 2011 3:11pm by Siros
Edited, Dec 19th 2011 3:12pm by Siros