Iframe top and left borders showing in IE11

I have tried everything, and I still cant get the iframe borders on the left or top to go.

Its fine in all the other browsers but for IE11.

To see what I am on about, go to this website, and click ‘Classes’ to slide down to the right place.

This is the code I am using at the moment -

<iframe frameBorder="0" marginheight="0" marginwidth="0" src="http://clients.mindbodyonline.com/classic/ws?studioid=140312&stype=-7&sTG=22&sView=week" style="MARGIN: 0px; WIDTH: 1040px; HEIGHT: 850px; appearance:none;-moz-appearance:none;-webkit-appearance:none;outline:none; overflow:hidden;"></iframe>

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