Just bought one to use as an external for my MB. I installed the software and checked for updates. Installed restarted and it didn't work. I reinstalled and it didn't work again. There's a preference panel in the system preferences but it says it can't be opened and I should check for updates, Which I've already done. The "next track" and "previous track" button don't work. Does anyone else have this keyboard and have a similar problem?