OnPaste In An IFrame Internet Explorer Not Firing?

So I am adding a little simple clean up function when users paste into an iframe with design mode on.

I have no problems with firing this function with Firefox

Code:

getElementById('add_article').contentWindow.document.addEventListener('paste', iFrameClean, true);

but for the life of me I cant get it to fire in Ie I have tried attachEvent in IE only

Code:

getElementById('add_article').attachEvent('onpaste', iFrameClean); //iframe onpaste

add an onpaste to the body of the iframe

Code:

onpaste="setTimeout(function(){iFrameClean();},100);"

even the onPaste in the iframes body doesnt fire in IE!!!

I have had a good look around but no one seems to have an answer on this.

note I have successfully attached the onblur and onfocus events to this iframe in IE and firefox

It would be really handy as people are copying html into the iframes. I have a html cleaner firing when they submit but I want the text to be cleaned when/if they paste in.