Please provide us with some details, first of all about your system, secondly, walk us through how you installed bias amp, how you tried to access it in Logic, if it shows up in the Plugin manager etc.
I have a newer imac then purchased logic. No issues until i tried to incorporate possitive grinds bias amp 2. Bias downloaded easy but cant seam to get it to play within logic. One of the bias plug ins shows up but doesnt work. Thinking i need to import bias?