Ableton Forum

I have Ableton set up on 2 PCs, on my laptop I am able to scroll through the previews by clicking along the wave form. This is useful as i ofetn preview 6 min+ tracks i have collected for sampling. However on my studio PC, I can't do this, I have gone through the options and I am sure they are set up the same.

Any ideas?

P.S my laptop is Vista, Studio is Windows 7