Hi,
I just thought I'd add my voice to help confirm this. I have a VH-12 (essentially the same as a VH-11) but was having issues with the CC level from the controller jumping around even though it would move up and down the various levels.
I made a little adapter (1/4" socket -> wire -> 1/4" plug) and soldered a 10k ohm 0.6 watt resistor that I bought from Maplin (a UK shop) between the tip and the ring connectors on the plug and the jumping completely disappeared!
I haven't used a soldering iron since I was at school and am never convinced someone elses solution for their problem will be the solution I will word for me - but in this case it worked like a charm!
Thanks everyone who found this out and posted up the information.