First of all, can you please try clearing your browser cache (cookies/history)
If you're not sure how to do this, this link will show you a step by step guide how to do this on your own browser.
Also, you can use this to go through a step by step to elimate the problem of missing pieces.
Let me know if you're still having problems please.
i can't see any of my chess pieces in any of the game....can you help me..i lost all my games because of it....