Trouble with music from laptop need help

So what been happening is I will be listening to music say from Spotify using spoiify connect from the ipad and them decide to listen to something using jriver, I will switch over to jriver select an song and no sound!!

I will open up the CA usb 2 sound card see that indeed it's working but no sound.
Look at the difference setting for the sound card everything seems correct,restarted the laptop and sound,great or so I thought.
Switch over from watching a movie to laptop no sound again.

So list of gear that could be the problem?
AVR Yammy 2040, with the other AVR never had this problem but because when I restart the laptop I get sound so I don't think the AVR is the problem.
Dac Magic 100 uninstalled / reinstalled driver, never made any difference.
jriver software seems to work fine.
HP 6500 note book running windows 7 professional, must be the problem but can't seem to be able to identify what causing this no sound issue.

Any help or suggestions would be appreciated.

Thanks
Roger