Unable to PUT

[danjedwards123]

I am able to GET with the emulator, and retrieve information. However when I attempt to PUT data, there is never a response and the data never gets updated in the emulator. Take a look at an image of the emulator console to see what I mean, I attempt to change the name of a light unsuccessfully.
http://prntscr.com/m1v375

I've been trying to mess around with this in Python, when I PUT deliberatly incorrect JSON I get the appropriate error, but when I pass valid data it seems to hang.

Any ideas?