iControlRest on Viprion guest

I'm trying to use iControl against some Viprion guests but get no response back from it. I was wondering if there's anything unique to icrd on Viprion guests. I have no issue with it on VE or physical hardware, but none of my VCMP guests respond, it just times out...no error, even locally.

 show sys service icrd
icrd         run (pid 6155) 47 days


Sys::Version
Main Package
  Product     BIG-IP
  Version     11.6.0
  Build       1.0.403
  Edition     Hotfix HF1