I got some help from a frirend and he told me that i would have to start a browerser and send in a link as a paramater to the browser.
In my particular case i would have to store my htmlpage somewhere on my harddrive ( c/temp/htmlPage.html) and send that address as the argument but in order to simplyfy this:
public void RedirectToOrder(Office.IRibbonControl control, bool isPressed)
{
System.Diagnostics.Process.Start(@"C:\Program Files (x86)\Internet Explorer\iexplore.exe", "http://movies.com");
}
hope it can help others!
EDIT:
I forgot 2 mention that i also had to change the xml...change the "button" to "toggleButton" or the callback method will never get run.