I switched instruments from concert bd to bd/tam tam and it continues to use the concert bd patch.  How do i get Sibelius 6 to load the patch? Thanks

Do you have enough instances of Kontakt or Kontakt Player 2 (which ever you're using) to load another patch? Check to make sure they aren't already maxed out at 16 instruments. If that's the case, simply activate another instance in your Playback Devices