[SR-Users] Kamailio with extern Presence and XCAP server

Hi all, Since 2 weeks I am trying to get Kamailio presence and xcap servers working. I am testing with RCS clients (native android clients). Somehow the presence server of kamailio doesn't like some subscribe events of RCS for example "Event: xcap-diff;path="resource-lists/users/sip:22222@kamailio.test/index", when RCS sends subscribe with this event, kamailio returns "Bad Event"... Another problem is some AUIDs used by RCS in the HTTP GETs for example ext-resource-lists. Kamailio doesn't support  such as AUIDs and replies with not supported auid error.... Now I want to use extern presence and xdms servers, which run on the same virtual machine, where Kamailio is running. What should I do to achieve this? Any advice would be appreciated... Thanks Medo