PHP Code Not Working?

Hi

I have the plug-in ‘php exec’ installed/activated to be able to use the php code from popshops. The strange thing is that it worked initially, but after i updated the plugins and did an auto update of wordpress to 2.7 it stopped working.

It just shows up as the php code on my pages now instead of the products with text.

Site is http://lcdflatpaneltvonline.com

Can anybody assist as i have tried for hours to solve this, but no luck.

Thanks,
Arjen