[SOLVED] CamillaDSP shows as offline in the pipeline editor

[inthemoode]

Probably something silly I haven't done, or done wrong, but I have upgraded to moOde 7.1 and wanted to experiment with CamillaDSP.  

However, nothing seems to be happening.  In the pipeline editor, it shows as offline, and moving the Volume causes an error (500 Internal Server error) as per below

{image doesn't seem to work sorry}