Caching problem with plugin

W3 Total cache is just great and pages load and look great but i have one very annoying problem… Im using a plugin named Gogadget weather and weather forecast widget and a shortcode which is inserted in header.php just after the body opening tag. The code looks like this: <?php echo do_shortcode(‘[GoGadgetWeather title=”Golden sands today” language=”en” Lat=”43.29″ Lon=”28.04″ layout=”header” float=”left” sidechange=”yes”]’); ?> and loads the weather in the top right corner of my site (CSS). But W3 keeps on caching my weather. I tried using fragmented caching with this syntax: <!– mfunc –><?php echo do_shortcode(‘[GoGadgetWeather title=”Golden sands today” language=”en” Lat=”43.29″ Lon=”28.04″ layout=”header” float=”left” sidechange=”yes”]’); ?><!– /mfunc –> but nothing changed… When i try with: <!– mfunc echo do_shortcode(‘[GoGadgetWeather title=”Golden sands today” language=”en” Lat=”43.29″ Lon=”28.04″ layout=”header” float=”left” sidechange=”yes”]’); –><!– /mfunc –> the weather seems to be changing but the page load speed is like it isnt cached at all. Sorry for the long problem description, any suggestions will be highly appreciated.
Thank you.

http://wordpress.org/extend/plugins/w3-total-cache/