Help Me Please!!!, Installing Cubase Options

[Justice]

Can anyone help?
Forgive me if this sounds dum, I am trying to install Cubase VST 24/24.41 [k] onto my mac. I have both os9 & X.
When I double click on the cubase symbol it opens a loading page then comes up with an error screen saying 'couldnt open sound input' I click on ok and another warning comes up saying 'Audio: audio coudnt create Native Audio Engine!'

Does anyone know how I can get this sorted so I can continue into the installation?

Thanks