Make sure you have an upto date version of Internet Explorer installed on your PC/Laptop (IE 7 or 8 should be fine).
Also make sure you have the latest version of Flash installed:-
<a class="postlink" href="http://www.adobe.com/products/flashplayer/" onclick="window.open(this.href);return false;">http://www.adobe.com/products/flashplayer/</a>
If you are still having problems, it might have something to do with your internet settings. Change the settings to allow all cookies.
If you are still having problems, download Firefox web browser, and launch the internet from here:-
<a class="postlink" href="http://www.google.co.uk/search?sourceid=navclient&hl=en-GB&ie=UTF-8&rlz=1T4ADBF_en-GBGB304GB305&q=firefox" onclick="window.open(this.href);return false;">http://www.google.co.uk/search?sourceid ... &q=firefox</a>
Hope this helps!