LINK SKILL LIMITATIONS
1. You can't have 2 of the same jobs linking 1 character.
2. You can't link a skill to 2 or more characters in the same world.
3. The linked character can be changed once a day.
4. A character can be linked by one or more classes that have a link skill.
Other than that, I am not sure why it would not work...
Maybe try leveling up, 30 is a preferred number by Nexon, and you could use some training anyways!