I took a look at your page and it looks like you changed your form element to hidden. What I meant was to add an additional form element that is hidden the form should post the value in IE.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.