Which browser and version are you using?
Live ches

I can play the tactics trainer part.. Have been playing on this site for years and it only happened 3 days ago where it won't play or should I say, about 2 minutes per move on live chess

Thanks, I'll investigate this end to see if we can see whats causing this. In the meantime, is there any chance you could update your browser to version 7 or 8 ?

At the top of your browser where it shows 'Help' click on that. If I remember correctly there should be an option to 'check for updates'.
If not, you can upgrade on this page: (Click for either version 7 or version 8 -
while we're updating the site to be compatible with ie9, not all of it is yet, so its not advisable to download version 9 just yet).
http://windows.microsoft.com/en-NZ/internet-explorer/downloads/ie
On live chess when I enter a game it states " undefined has offered a draw accept/decline and I can't play