you might want to supply a link to where you are doing this and paste what code you are using and where you are putting it
This is the code that I’m pasting into the HTML section of the wordpress.com editor. http://joellawilson.wordpress.com
<embed width=”448″ height=”365″ src=”http://www.ifilm.com/efp” quality=”high” bgcolor=”000000″ name=”efp” align=”middle” type=”application/x-shockwave-flash” pluginspage=”http://www.macromedia.com/go/getflashplayer” flashvars=”flvbaseclip=2779121&playlisttype=favorites&playlistid=joellawilson” ></embed>
Here’s the link to the Viper plugin for wordpress..it allows for ifilm, utube and other video’s to be put in posts easily.
http://www.viper007bond.com/wordpress-plugins/vipers-plugins-used/
The plugin free way to do this is to go to your Users:My Profile tab, and at the bottom there is a checkbox for ‘use visual rich text editor’ or something close to that. Uncheck the box, paste in your ifilm embed code, and make the post. Once posted, you can recheck the box for future normal use.