Hi
You may need to add: 'wmode','transparent',
into the line:
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,28,0','name','nava_logo','width','822','height','160','id','nava_logo','src','flash/Nava_Logo_Slides_2','quality','high','pluginspage','http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash','movie','flash/Nava_Logo_Slides_2' ); //end AC code
i.e:
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,28,0','name','nava_logo','width','822','height','160','id','nava_logo','src','flash/Nava_Logo_Slides_2','wmode','transparent','quality','high','pluginspage','http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash','movie','flash/Nava_Logo_Slides_2' ); //end AC code