Try again. Choose one audio file. Then go to menu bar, File -> Get information.
Then you will see the window shown below. Then choose Open with ... choose iTunes for OSX which will be a much higher version than Classic iTunes (version 4.9). If you have iTunes version 7 for OSX, you'll notice the icon is blue not green. Then after selecting, choose the Change All button. If you don't see the OSX version on the list, then scroll down the window & choose Other. Then direct it to the OSX applications folder & find iTunes for OSX. You "might" need to close LW & re-open for LW to recognise the change.