Download the latest version of Java. If that still doesn't work, take a picture of it.
Here is an easy way to take a picture. Press 'Print Screen'. It is to the right of F12. Make sure you take a picture of TamaChat- not an MSN conversation. Then go onto [insert Paint system here] and select PASTE. Your image of your computer screen should appear. If you want to make any marks showing where the X is, that is fine. Just don't cover up the whole X.
Save the image, and go onto imageshack, tinypic, or whatever uploading site you choose. You will get a link, thus you can post it on TamaTalk.