If none of those things help, please come back to this post and reply with all the information requested in that thread, especially:
1) Which browser and version are you using (eg., Firefox 3.5.9, Internet Explorer 7, etc.)
2) Have you deleted your internet cache / browser history of files and tried again?
3) Have you tried a different browser (we suggest Google Chrome or Firefox)?
O.K I have figured it out thanks @Nifty-Chicken . It was to do with my firewall. When I reset my system it deleted my fire wall so all I had to do was re-download it and update it. So now my BYC is working fine