Wmode="transparent" issue

I have a combobox component in my flash movie and i have embedded it in a html file. This is the code i have used to have it embedded, so as to make the movie background transparent. Note the ‘wmode’ parameter which i have set to ‘transparent’.

<param name="wmode" value="transparent" />
    <embed src="Listbox.swf" width="550" height="400" quality="high"
 pluginspage="http://www.macromedia.com/go/getflashplayer"
 type="application/x-shockwave-flash" wmode="transparent"></embed>

Now i cant see any of the flash builtin components contained in the movie - be it a combobox component, button component or colorpicker component. All the other custom components that i created seems to work fine. But if i remove the ‘wmode’ parameter from the HTML code, all the components work just fine!!!