Your problem is due to compression. Most hosts nowadays are installing mod_gzip and mod_deflate. Both of these programs are intended to save on bandwidth by compressing files before sending them to your browser. The problem is that flash video is already compressed (just like images). This "dual" compression causes a ton of problems with the newer players. vShare, by default, turns off mod_gzip (in the .htaccess). It does not, however, reconfigure mod_deflate. You will need to first check to see if your server has mod_deflate installed. If it does, you will need to find the configuration file for it (usually, it's in the same directory or a subdirectory of where your httpd.conf file is located) and add the FLV extension to its list of pass through extensions. That will resolve your problem.