The standard version does not require a license file and therefore a 'Powered by OSAKit' is shown! more differences can be found here :
http://www.osakit.com/pages/pro-version.php
I tested it on Vista on different machine and all is ok, I will test your game and maybe make a custom page specifically for you because I think you has something wrong in your page code!
http://www.osakit.com/pages/pro-version.php
I tested it on Vista on different machine and all is ok, I will test your game and maybe make a custom page specifically for you because I think you has something wrong in your page code!