DX devices won't register to sub

[billmatthews]

My DX series devices (DX-650, 70, and 80) are working fine when registering directly to my publisher.  But when I flip my CM Group to make them register to my subscriber node, they don't register.  Phone display error is attached. The error from the console logs is DEB ccservice: Reason: SIP;cause=200

All other phones (non-DX models) register fine to the subscriber.

Are there any particular features that need to be enabled on the subscriber for the DX devices? 

Thanks

[Andrew West]

What version is your cluster? 

[billmatthews]

Sorry should have included that.  It's System version: 10.5.2.10000-5

[Manish Gogna]

Please ensure that the device pack was installed on the subscriber as well and restart the TFTP service on the subscriber.

HTH

Manish