Problamas con expresiones regulares

Tengo un problema con una expresion regular, no se mucho de eso, pero encontre un script que en teoria tendria que estar funcionando, pero no lo hace

Código :

preg_replace("#\[flash width=([0-6]?[0-9]?[0-9]) height=([0-4]?[0-9]?[0-9])\](([a-z]+?)://([^, \n\r]+))\[\/flash\]#si","<OBJECT WIDTH=\\1 HEIGHT=\\2><PARAM NAME=movie VALUE=\\3><PARAM NAME=quality VALUE=high><PARAM NAME=wmode VALUE=transparent><EMBED src=\\3 quality=high scale=noborder wmode=transparent WIDTH=\\1 HEIGHT=\\2 TYPE=\"application/x-shockwave-flash\"></EMBED></OBJECT>", $entry);

al poner el siguiente bbcode

Código :

[flash width=512 height=512]http://213.251.135.30/flash-mania/flash3/sport/tennis/055.swf[/flash] 

tendria que mostrarme como resultado

Código :

<OBJECT WIDTH=512 HEIGHT=512><PARAM NAME=movie VALUE=http://213.251.135.30/flash-mania/flash3/sport/tennis/055.swf><PARAM NAME=quality VALUE=high><PARAM NAME=wmode VALUE=transparent><EMBED src=http://213.251.135.30/flash-mania/flash3/sport/tennis/055.swf quality=high scale=noborder wmode=transparent WIDTH=512 HEIGHT=512 TYPE=\"application/x-shockwave-flash\"></EMBED></OBJECT>

Es parte de una funcion para parsear bbcode (con soporte para flash). La funcion completa es esta:

Código :

function bbcode ($entry) {
   $entry = eregi_replace("\n","<br>",$entry);
   $entry = eregi_replace("\[b\]([^\[]+)\[/b\]","<b>\\1</b>",$entry);
   $entry = eregi_replace("\[i\]([^\[]+)\[/i\]","<i>\\1</i>",$entry);
   $entry = eregi_replace("\[u\]([^\[]+)\[/u\]","<u>\\1</u>",$entry);
   $entry = eregi_replace("\[mail\]([^\[]+)\[/mail\]","<a href=\"mailto:\\1\">\\1</a>",$entry);
   $entry = preg_replace("#\[size=([1-2]?[0-9])\](.*?)\[/size\]#si", "<FONT SIZE=\\1>\\2</FONT>", $entry);
   $entry = eregi_replace("\[url\]([^\[]+)\[/url\]","<a href=\"\\1\" >\\1</a>",$entry);
   $entry = eregi_replace("\[url=\"([^\"]+)\"]([^\[]+)\[/url\]","<a href=\"\\1\" >\\2</a>",$entry);
   
   // Simple Link
   $entry = preg_replace("#(^|[\n ])([\w]+?://[\w\#$%&~/.\-;:=,?@\[\]+]*)#is", "<a href=\"\\2\">\\2</a>", $entry);
   
   // [IMG]source.jpg[/IMG] 
   $entry = eregi_replace("\[img\]([^\[]+)\[/img\]","<img USEMAP=\"\" onload=\"javascript:if(this.width>577 ){this.width=577;}\" src=\"\\1\" border=\"0\">",$entry);
   
   // [mp3] 
   // new bbcode [STREAM]source.mp3[/STREAM]
   $entry = eregi_replace("\[stream\]([^\[]+)\[/stream\]","<object type=\"application/x-shockwave-flash\" data=\"http://www.1pixelout.net/wp-content/plugins/audio-player/player.swf\" width=\"290\" height=\"24\" id=\"audioplayer1\"> <param name=\"movie\" value=\"http://www.1pixelout.net/wp-content/plugins/audio-player/player.swf\"/><param name=\"FlashVars\" value=\"playerID=1&amp;autostart=no&amp;leftbg=0xcccccc&amp;&amp;lefticon=0x767676&amp;rightbg=0xB4B2B4&amp;rightbghover=0x999999&amp;righticon=0xFFFFFF&amp;righticonhover=0xFFFFFF&amp;text=0x666666&amp;slider=0x666666&amp;track=0xFFFFFF&amp;border=0x666666&amp;loader=0xE4E4E4&amp;soundFile=\\1\" /> <param name=\"quality\" value=\"high\"/><param name=wmode value=transparent><param name=\"menu\" value=\"false\"/></object>",$entry);
   
   // [FLASH WIDTH=x HEIGHT=y]source.swf[/FLASH]
   $entry = preg_replace("#\[flash width=([0-6]?[0-9]?[0-9]) height=([0-4]?[0-9]?[0-9])\](([a-z]+?)://([^, \n\r]+))\[\/flash\]#si","<OBJECT WIDTH=\\1 HEIGHT=\\2><PARAM NAME=movie VALUE=\\3><PARAM NAME=quality VALUE=high><PARAM NAME=wmode VALUE=transparent><EMBED src=\\3 quality=high scale=noborder wmode=transparent WIDTH=\\1 HEIGHT=\\2 TYPE=\"application/x-shockwave-flash\"></EMBED></OBJECT>", $entry);
   
   
   return $entry;
}