Editor is Messing Up the Code

Hi,

I’m using wordpress 2.3 ver and when I create a post with the below code

<object classid="clsid:67DABFBF-D0AB-41fa-9C46-CC0F21721616" width="704" height="596" codebase="http://go.divx.com/plugin/DivXBrowserPlugin.cab"><br />
<param name="dummy" value="content" />
<param name="autoPlay" value="false" />

<param name="src" value="http://www.dustindiaz.com/downloads/screencasts/screencast-05-ajax-contact-in-15-minutes.divx" /><embed type="video/divx" autoPlay="false" src="http://www.dustindiaz.com/downloads/screencasts/screencast-05-ajax-contact-in-15-minutes.divx" width="704" height="596" pluginspage="http://go.divx.com/plugin/download/"></embed></object>

the view of the post is fine but as soon as I edit the post & just save it the wordpress editor mess up the code, below is the messed up code which is modified by editor. Whether I write text along with the above code or not it’s always mess it up:

<object classid="clsid:67DABFBF-D0AB-41fa-9C46-CC0F21721616" codebase="http://go.divx.com/plugin/DivXBrowserPlugin.cab" height="596" width="704"></object>

<param name="dummy" value="content"></param>
<param name="autoPlay" value="false"></param>
<param name="src" value="http://www.dustindiaz.com/downloads/screencasts/screencast-05-ajax-contact-in-15-minutes.divx"></param><embed src="http://www.dustindiaz.com/downloads/screencasts/screencast-05-ajax-contact-in-15-minutes.divx" type="video/divx" autoplay="false" pluginspage="http://go.divx.com/plugin/download/" height="596" width="704"></embed>

Please check it yourself and tell me how to fix the bug.

Nancy