If you’re using Cubase Pro 8 or I’m guessing Artist 8, the problem that people are referring to with Cubase Elements 8 is a different problem. If you just need to change the 'Attributes" in Media Bay that is different than the Acoustic agent not being present at all in Elements 8 due to it not being part of the program. See link below if you have Elements 8 and the above post if you have something other.