Do you know the height & width of your slideshow? Something like:
<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0" width="770px" height="220px">
or some height and width that fits in your layout
I'm not familiar with your flash application, so I don't know if there is a reason for the 100% size settings. If you need them - you might try putting the entire object></object> in a div of fixed size:
<div style="height:220px; width:770px">
<object ...
</object>
</div>