i was trying to embed slideshare presentations in live spaces but there is some wierd problem:

slideshare gives a object code something like this:

<object type="application/x-shockwave-flash" data="http://s3.amazonaws.com/slideshare/ssplayer.swf?id=18404&doc=vision-202-2888" width="425" height="348"><param name="movie" value="http://s3.amazonaws.com/slideshare/ssplayer.swf?id=18404&doc=vision-202-2888" /></object>

now when i go into the html mode and copy this code and select preview it shows the presentation but when i publish the entry the presentation is not there and now after publishing if i go back to edit mode then the entire code is absent ....

any help, any plugin or something