Using Internet Explorer?

For best performance with Internet Explorer, please ensure you have Play animations in web pages turned on or checked.

You can accomplish this in the following way:
1) Open Internet Explorer and click the Tools menu and choose Internet Options
2) Now select the Advanced tab and navigate to Multimedia section
3) Check the option Play animations in webpages to enable animations
4) Click Apply and then OK button
5) Close and reopen Internet Explorer for the changes to take effect

(This setting allows you to decide whether to play animations in webpages or not.)