Gryphon Not learning when clicked!

I have been having an issue with my Gryphons. I bought 2 Griffins the Ebon and I believe the white one. When I right click them to learn them I get the message "You cannot equip this item". Just curious if someone else had this issue and how to fix it because its going to make future problems as I start getting to where i need to fly to places. Icecrown Ulduar Naxxramas Etc. I also have a recorded video of this issue. If someone can tell me if its a client bug or if i just need to buy another kind of gryphon i would apprieciate it!

https://www.youtube.com/watch?v=Wu49A5jSPcM