Recruitable Mercenaries

I'm relatively new to trying to mod have played around some minor stuff. So I went in, and made Sardinia Area I believe, cagliari island etc have dismounted crusader knights . So when playing as one of the european nations the country that get's one or all of those areas can recruit them. So I capture both islands from the rebels, and begin recruiting them, sending them to mainland for battles, and return them to the island to be retrained to make up for losses. It worked like a champ, and I never lost the islands or the area in africa to the south. For some reason, I could still recruit them, but could no longer retrain them up to their original #'s

Any ideas ?