[BirdOPrey5]

Your code has a useless "classid" parameter... you should at least remove that from the code-

Your also missing the "type" from the <embed>

<object type="application/pdf" data="{param}" width="800" height="900">
<param name="src" value="{param}" />
<embed src="{param}" width="800" height="900" type="application/pdf" />
</object>

Not tested but that would be the appropriate code using both <object> and <embed>.