Share This & Internet Explorer (display problem)

I am using the latest version of WordPress 2.7.1 and installed and activated the Share This plugin. The plugin works in all browsers if I select the option to automatically add it to posts. However, I was not happy with the display when this happened, as it conflicted with another post attachment plugin (Subscribe Remind).

Instead I opted to follow these instructions and turn off the automatic add function. I added the given code ( <?php if (function_exists('sharethis_button')) { sharethis_button(); } ?> ) where I wanted it in my site and it looks perfect in Firefox. In IE7, however, it displays this code instead of the button:

SHARETHIS.addEntry({ title: "Farmers Market Update: Where’s Winter?", url: "https://summertomato.com/farmers-market/wheres-winter/" });

This seems like a simple problem, but I can’t figure it out. My site is summertomato.com and any help with this would be greatly appreciated ??