Problem with Button Swfs not showing properly on Firefox

[Vangoghear]

Hi I am having problems with my button swfs not showing properly on Firefox. I have embedded them in my HTML page. They work fine on Internet Explorer and Safari but on Firefox when I first pull up the page some swfs do not show up. I have to roll my mouse over them to appear.
Any suggestions.
Here is the code I am using to embed swf. Any suggestions would help. I'm going crazy trying to get this to work. (':shock:')

<td valign="top"><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0" width="55" height="16">
<param name="movie" value="text12.swf" />
<param name="quality" value="high" />
<param name="bgcolor" value="#000000" />
<embed src="text12.swf" quality="high" pluginspage="http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" width="55" height="16" bgcolor="#000000"></embed>
</object></td>

UserAgent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5; en-US; rv:1.9.0.1) Gecko/2008070206 Firefox/3.0.1