Why don't you try to insert your Flash banner this way:
HTML Code:
<code>
<object height="60" width="468" type="application/x-shockwave-flash" data="path/to/banner.swf?clickTAG=http://urlgoes.here/"/>
<param name="WMode" value="transparent"/>
<param name="quality" value="high"/>
<param name="menu" value="false"/>
<param name="allowFullScreen" value="true"/>
<param name=play value=true>
<param name=loop value=true>
<param name="movie" value="path/to/banner.swf?clickTAG=http://urlgoes.here/"/>
<p>Alternative text goes here</p>
</object>
</code>