redirection problem with FF

[hoov]

I have installed a custom award hack.....with an award button in postbit which leads me to a site called something like /forum/award.php now if I do my actions on that site I want to be redirected to the post I clicked the award button.....on IE everything works fine but on FF I only see a an empty page and it won't redirect me to the thread alltough the action was accepted...so I would need to go back and refresh everytime.....
this is the code I'm using:

echo "<meta HTTP-EQUIV=\"REFRESH\" content=\"0; url=" . $vbulletin->options['bburl'] . "/showthread.php?p=" . $_REQUEST['postid'] . "/\">";

any thoughts what I'm doing wrong or ideas why is this????

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