Can't Access Audio When Importing Video

I’m new to cubase LE5 and can’t get any audio when importing a video. The video utilises quicktime and plays normally on the desktop.

The path I take has been

FILE>IMPORT>VIDEO FILE> I then click on video file of my choice and it loads up onto cubase screen - I get the thumbnails and the video window.

How do I get the audio to show on the screen?

Grateful if you could help.