RTC API - linking changesets to workitems on deliver - serverside

Hi,

I'm trying to link workitems to changesets in an operation participant on a deliver but I'm getting this problem:

Links of this type may only be modified by the defining component.
    Link Type: com.ibm.team.filesystem.workitems.change_set
    Defining Component: com.ibm.team.filesystem.workitems
    Requesting Component: testparticipant.extensionService2

using the method at https://jazz.net/forum/questions/82384/serverside-create-link-from-a-workitem-to-a-changeset

And when trying a different approach I ran into a very similar problem that looked something like this

Links of this type may only be modified by the defining component.
    Link Type: com.ibm.team.filesystem.workitems.change_set
    Defining Component: com.ibm.team.filesystem.workitems
    Requesting Component: com.ibm.team.workitem          

except I'm unsure about what the last line looked like. If it helps It was caused in the saveWorkItem2 method of the WorkItemServer class.

You can find the second method here:

rsjazz.wordpress.com/2012/09/20/the-rtc-workitem-server-link-api-linking-to-work-items-and-other-elements/

From the looks of it I need to use a method in the 'Defining component' in order to the save the link. But I'm clueless as to how I would go about getting access to this component.

I tried the scm service

IScmService scmService = getService(IScmService.class);

but the CreateLinks method says that it is "experimental" when highlighted.

Any help is appreciated.

Thanks!.

RTC:4.0.7