Playing HTTP audio stream

I am trying to play an HTTP stream out to a chromecast device.

I have an http request setup as:
Method : Get
Return: a binary buffer

I have a Change node followed by a castv2-sender node in the sequence.

The problem is that things seem to get hung up at the http request node as "Requesting"

If I change the URL to another like Google I get the http data. Obviously I'm doing something wrong