How to play back the recorded video after online class end in BigBlueButton

I have install plugin BigBlueButtonBN for Moodle to create an online class follow [this link](http://moodle.org/plugins/view.php?plugin=mod_bigbluebuttonbn). This online class is recorded (Webcam, slide show, chat message). After online class end, when click to the class link, it shows "This activity is over. There is no recording yet, please come back later." This should be showed the link to playback the recorded video. Please show me how to do this? I use Moodle 2.3.1 and BigBlueButton 0.8 release. Update: This is OK when i use Moodle 2.3.1 with BigBlueButton 0.8 **beta** version (can show the recorded video link after online class ended) but this problem occur after i upgrade to BigBlueButton 0.8 **release** version.