Embedding a youtube video problem on publish

I am having trouble publishing a youtube video to my website. I use Kompozer and embed the "old style" code youtube gives for the video and I see it after I save it and browse the page but when I publish it the embed code changes so I have a blank white box where the video should be. I thought this was going to be an easy do. Cant figure out what to do. PLEASE advise. Thanks.

pre html before publishing to web
<object width="560" height="315"><param name="movie" value="http://www.youtube.com/v/ayG3bx172JI?version=3&amp;hl=en_US&amp;rel=0"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/ayG3bx172JI?version=3&amp;hl=en_US&amp;rel=0" type="application/x-shockwave-flash" width="560" height="315" allowscriptaccess="always" allowfullscreen="true"></embed></object>

after publish: <embed src="ayG3bx172JI" type="application/x-shockwave-flash" width="560" height="315" allowscriptaccess="always" allowfullscreen="true"></embed></object>