IE Caching & Rabbitweb

I have a Rabbitweb enabled web application that is running on a RCM6700 and it works great on Firefox, Chrome, Safarai, Opera and any other web browser. But if I run IE, and don't pull up the developer tools (which seems to disable IEs aggressive caching) the application just looks frozen. Once I looked into the back end of it I realized that it was because it was retrieving my XML file I'm using a XMLHttpRequest() to pull from the server, from IEs cache instead of pulling it from the RCM 
 

 I have not found any way to specify the headers of the XML file to modify the cache expiry, or do anything else that would force IE to not think it can just use the cached version of the file. I don't want to append a datestamp or any other sort of unique nonsense on the end of the GET if that is at all possible. I just want to tell IE that this is a non cacheable file, or that the cache expiry was -1 mins ago or something like that. I know its possible just annoying.  
 

 Anyone got any ideas?