photos don't apper on my computer through photo stream

Hi

I've enabled Photostream on my I5 phone, installed icloud control panel and logged into my account. However I don' seen my photos appearing on my laptop. I'm running windows 7 here. I've reinstalled the control panel 3 times and no luck.

Anybody understand why I'm see my photos on my computer. My phone has placed the photos into My Photostream folder but not much activity?