Airport Utility 6.3.1 does not recognize Airport Extreme 7.6.4

Running OS 10.8.5. Message "This version of AirPort Utility doesn't support this base station. Go to AirPort Service...for more info" pops up. My wireless internet networks are fine but I am trying to network a printer and a few other mobile devices and I need to use the AirPort Utility. Anyone have an answer for me? I believe I am running on the latest for what is necessary and am not sure why this is happening.