Need help coding

Im trying to write HTML in XHTML 1.0 Strict. Im using the <object> tag to load a Flash game but it wont appear in IE. How do I set it up so that it will load in both IE and FF but still use the <object> tag?
When I use <object width="550" height="400"><param name="movie" value="/swf/canabalt.swf"></object> it appears in FF but not IE.
Help!
Page: http://mk0092.llllost.com/Canabalt.html
When I use <object width="550" height="400"><param name="movie" value="/swf/canabalt.swf"></object> it appears in FF but not IE.
Help!
Page: http://mk0092.llllost.com/Canabalt.html