Solved Essentials custom messages

How can I add a prefix to every message? This is what I tried:
I replaced every "=" to "=[PREFIX] "
Example:
This is what it was before:

Code:

flyMode=\u00A7eSet fly mode\u00A76 {0} \u00A7efor {1}\u00A7e.

And after:

Code:

flyMode=[PREFIX] \u00A7eSet fly mode\u00A76 {0} \u00A7efor {1}\u00A7e.

But for some reason it will show up like this:
http://prntscr.com/8sj1qc

I'm stupid, I found the problem.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.