Flash Player 11.9.900.117 does not work on some web sites!

I have recently downloaded the newest version of flash player (version 11.9.900.117) and it is working fine with things like Youtube. However some websites that use flash player are coming up with the error message 'To view this page ensure that Adobe Flash Player version 10.0.0 or greater is installed'? I dont understand why this is happening as the version I have is 11.9.900.117 for Internet Explorer?? Please help this is driving me crazy!!!

My system information and details are:

Operating System: Windows Vista

Browser IE 9.0.8112.1641

Update Versions 9.0.21

Specific URL http://www.videoweed.es/file/ec42c748dc328

Thanks