Chromecast issue

Hey, I have setup steward in a MAC mini, and it detects my Chromecast device successfully. But when I play a track on the device thru steward, device status is still idle. Any suggestion for debugging the issue ? Also when in play a track via steward, i receive error as "error: [media] device/5 Chromecast9133 event=ramp failure, msg=Cannot call method 'send' of undefined". Please guide me