And here's the offical reply from pogo tech support.
Thank you for contacting again.
As your have mentioned that you're using Internet Explorer version 8.0. Please be aware that Pogo.com does not officially supports this browser version. So in your situation, we recommend trying the new FireFox browser instead, since it works generally well with Pogo games and is becoming increasingly popular a choice for general browsing.
Here are the steps you'll need to follow to download and configure FireFox.
1. Go to http://www.getfirefox.com
2. Click the "Free Download" link in the upper left part of the screen.
3. When asked to run or install the application, choose "Run", "Install", or "Yes".
4. After Firefox is installed, try Pogo games again. Hopefully they will run smoothly now.
If I can help you with anything else, please write back and let me know.