WebBrowser control not submitting form, IE 7 works

Question

We are using a WebBrowser control in our win forms application which is running in terminal services. IE 7 is the browser that is installed for the session. We are using WebForms to generate the web pages.

If we try and submit a web page in the WebBrowser control it does not work. The submit button does not push down.

If we try and submit a web page in IE 7 that is installed on the same machine it works as expected.

This is only an issue for one person. The WebBrowser control is working for other users.

Any thoughts on how I can debug why the submit button is not submitting for the WebBrowser control?

Thanks in advance.