Need help with scoreboards

Hi dere everyone,

so I've made added this class to my API, basically it should easy some things when working with scoreboads. However when I attempt to change the nameplate prefix or suffix of the main-team assigned to the scoreboard, it for some reason does not update on the characters.

Any ideas on how to fix this? Or perhaps there's a better/different way of both changing prefixes and suffixes on nameplates and still be able to hide/show/whatever them using the NameTagVisibility?

Here's my code:
http://pastebin.com/tC76RSQU

Thanks for your time!!