37380 Flash / php Troubleshoot

Note, Experience of PHP and Flash FLV and swf/flvplayers is a must. Will need examples or referral to show past experience. Currently we have a PHP code generator that spits out the html code to play an flv file as referenced in the same folder, using php However the resulting file plays fine in IE but not firefox. Need you to trouble shoot and fix, edit existing php file for same to enable play in firefox/mozilla