[chuck-users] Problem with multiple audion sources

I am a new chuck user and have just installed linux-alsa from source.  All works well as long as there is no other audio source active. If there is another active audio source active I get this message when, for example, I type in chuck --loop: [chuck]: RtApiAlsa::getDeviceInfo: snd_pcm_open error for device (hw:0,0), Device or resource busy. This seems to be a chuck issue as I can run multiple audio sources as long as one of them is not chuck. My concern is that I started a coursera course on chuck and would like to use chuck concurrently with the course. My operating system is Kubuntu Linux 12.04. Does anyone have any ideas? Thank you, Monon