FF A2 Grimoire of the rift help

i unlocked the Dragoon job but when i go to change it the job is shown in gray and not white.
am i lacking levels or something?

Replying to #1

Each job (except some base jobs) require a combination of a number of mastered skills in other jobs. Dragoon requires your character to have two skills mastered in the Warrior class.
http://www.gamefaqs.com/ds/937330-final-fantasy-tactics-a2-grimoire-of-the-rift/faqs/53265

Replying to #2

thanks