Starting with Google Chrome version 23, Google is blocking the Tegrity playback plugins from functioning once installed on Windows.
Mac users will always need to use Firefox or Safari.
Google Chrome displays a banner stating “Windows Media Player needs your permission to run.” If you click “Run this time” or “Always run on this site,” the recording still won’t play. To work around this issue, please follow the directions below:
1) Open Google Chrome.
2) Type chrome://plugins/ in the address bar.
3) Scroll down and set Windows Media Player and TegRunner Plugin to Always allowed.