RTC-DOORS: RCR state not transitioning

Hi all,
I'm using DOORS (v9.5.2.1) to manage my requirements and I need to enable requirement change control using RTC (v4.0.6).
I've used these two very useful links:
http://pic.dhe.ibm.com/infocenter/doorshlp/v9r5/index.jsp?topic=%2Fcom.ibm.rational.doors.integrating.doc%2Ftopics%2Ft_define_config_templates.html

https://jazz.net/library/LearnItem.jsp?href=content/articles/rtc/3.0/configuring-doors-and-rtc-to-integrate/index.html#a3

When I open a change management controlled module in DOORS, I can see the list of "Assigned" CRs allocated to the user.
I can make changes as expected. Fine.

But when I try to send the RCR for review (action "Submit Work" - next state "Review"), I have the following error:
 

If I log in RTC with the same user and update the RCR state, then no problem.
It goes to the "review" state as expected.
And I can go back in DOORS and use the "Review" feature without problem.

I have the same problem with the "Apply" feature.
I can see the "Approved" RCRs in DOORS.
I select one and apply it.
Same error message than above (except the workflow state is s5 instead of s2).
But changes are applied in DOORS and RCR status is never updated in RTC (Half job done and database state is not consistent)
Here's the apply log:

===================================================Start processing Requirements Change Request Requirement Change Request 18 :===================================================1 member Module RCs found.On module(00000280) /TPD Test data 1.0/01.Business Requirements/01.Business Requirements:     <Edit this object> /TPD Test data 1.0/01.Business Requirements/01.Business Requirements/13 by nvt 05/01/14 11:32:36.Open module in edit mode...     Module /TPD Test data 1.0/01.Business Requirements/01.Business Requirements is opened in Shareable or Exclusive Edit mode.Checking access rights...Detecting conflicts...On module(00000280) /TPD Test data 1.0/01.Business Requirements/01.Business Requirements:Applying member RCs (pass 1)...     Insert recorded object 13 right after the object 3.     Modify object 13.On module(00000280) /TPD Test data 1.0/01.Business Requirements/01.Business Requirements:Applying member RCs (pass 2)...     Transition RC Requirement Change Request 18_req00000280_13 to applied...Transition Module RC for module(00000280) to applied...Save module /TPD Test data 1.0/01.Business Requirements/01.Business Requirements...Cannot transition RCR Requirement Change Request 18 to RCR Workflow.state.s4.  Applying RCR Requirement Change Request 18 Failed.Apply process Stopped!!!

My configuration template in DOORS:

cm_oauth_url=https://tpddrtw01.raillink.nsw.gov.au:9443/ccm/oslc/contexts/_pV7tDbrcEeOjUa_HdMiYLw/workitems/services.xmlcm_queryurl=https://tpddrtw01.raillink.nsw.gov.au:9443/ccm/oslc/contexts/_pV7tDbrcEeOjUa_HdMiYLw/workitemscm_roleurl=https://tpddrtw01.raillink.nsw.gov.au:9443/ccm/oslc/contexts/_pV7tDbrcEeOjUa_HdMiYLw/workitems/services.xmlcm_url=cq_applyAction_attr=cq_enable=falsecq_reviewAction_attr=csint_authentication=OAUTHcsint_template_name=RCR Debugrcr_applied_value=RCR Workflow.state.s4rcr_approved_value=RCR Workflow.state.s3rcr_assigned_value=RCR Workflow.state.s1rcr_conflict_behavior=OFFrcr_review_value=RCR Workflow.state.s2rcr_show_reject=falsercr_show_report=falsercr_submit_form=https://tpddrtw01.raillink.nsw.gov.au:9443/ccm/oslc/contexts/_pV7tDbrcEeOjUa_HdMiYLw/modules/com.ibm.team.workitem.WICreationDialog?projectAreaId=_pV7tDbrcEeOjUa_HdMiYLw&showLoginLink=true&dc%3Atype=rcrrcr_submit_form_selected=Requirement Change Requestrg_default_query=rg_default_type_selected=rg_default_typeurl=https://tpddrtw01.raillink.nsw.gov.au:9443/ccm/oslc/contexts/_pV7tDbrcEeOjUa_HdMiYLw/workitemsrtc_applyAction_attr=RCR Workflow.action.a5rtc_enable=truertc_reviewAction_attr=RCR Workflow.action.a2rtc_state_attr=rtc_cm:state

Extract from the workflow state xml description:

<oslc_cm:Collection oslc_cm:totalCount="5">
    <rtc_cm:Status rdf:resource="https://xxx:9443/ccm/oslc/workflows/_pV7tDbrcEeOjUa_HdMiYLw/states/RCR%20Workflow/RCR%20Workflow.state.s1">
        <dc:identifier>RCR Workflow.state.s1</dc:identifier>
        <dc:title>Assigned</dc:title>
        <rtc_cm:iconUrl>...</rtc_cm:iconUrl>
        <rtc_cm:group>inprogress</rtc_cm:group>
    </rtc_cm:Status>
    <rtc_cm:Status rdf:resource="https://xxx:9443/ccm/oslc/workflows/_pV7tDbrcEeOjUa_HdMiYLw/states/RCR%20Workflow/RCR%20Workflow.state.s2">
        <dc:identifier>RCR Workflow.state.s2</dc:identifier>
        <dc:title>Review</dc:title>
        <rtc_cm:iconUrl>...</rtc_cm:iconUrl>
        <rtc_cm:group>inprogress</rtc_cm:group>
    </rtc_cm:Status>
    <rtc_cm:Status rdf:resource="https://xxx:9443/ccm/oslc/workflows/_pV7tDbrcEeOjUa_HdMiYLw/states/RCR%20Workflow/RCR%20Workflow.state.s3">
        <dc:identifier>RCR Workflow.state.s3</dc:identifier>
        <dc:title>Approved</dc:title>
        <rtc_cm:iconUrl>...</rtc_cm:iconUrl>
        <rtc_cm:group>inprogress</rtc_cm:group>
    </rtc_cm:Status>
    <rtc_cm:Status rdf:resource="https://xxx:9443/ccm/oslc/workflows/_pV7tDbrcEeOjUa_HdMiYLw/states/RCR%20Workflow/RCR%20Workflow.state.s4">
        <dc:identifier>RCR Workflow.state.s4</dc:identifier>
        <dc:title>Applied</dc:title>
        <rtc_cm:iconUrl>...</rtc_cm:iconUrl>
        <rtc_cm:group>closed</rtc_cm:group>
    </rtc_cm:Status>
    <rtc_cm:Status rdf:resource="https://xxx:9443/ccm/oslc/workflows/_pV7tDbrcEeOjUa_HdMiYLw/states/RCR%20Workflow/RCR%20Workflow.state.s5">
        <dc:identifier>RCR Workflow.state.s5</dc:identifier>
        <dc:title>Cancelled</dc:title>
        <rtc_cm:iconUrl>...</rtc_cm:iconUrl>
        <rtc_cm:group>closed</rtc_cm:group>
    </rtc_cm:Status>
</oslc_cm:Collection>

Extract from the actions XML description file:

<rtc_cm:Action rdf:resource="https://xxx/ccm/oslc/workflows/_pV7tDbrcEeOjUa_HdMiYLw/actions/RCR%20Workflow/RCR%20Workflow.action.a2">
    <dc:identifier>RCR Workflow.action.a2</dc:identifier>
    <rtc_cm:resultState rdf:resource="https://xxx/ccm/oslc/workflows/_pV7tDbrcEeOjUa_HdMiYLw/states/RCR%20Workflow/RCR%20Workflow.state.s2"/>
    <dc:title>Submit Work</dc:title>
    <rtc_cm:iconUrl>...</rtc_cm:iconUrl>
</rtc_cm:Action>
...
<rtc_cm:Action rdf:resource="https://xxx/ccm/oslc/workflows/_pV7tDbrcEeOjUa_HdMiYLw/actions/RCR%20Workflow/RCR%20Workflow.action.a5">
    <dc:identifier>RCR Workflow.action.a5</dc:identifier>
    <rtc_cm:resultState rdf:resource="https://xxx/ccm/oslc/workflows/_pV7tDbrcEeOjUa_HdMiYLw/states/RCR%20Workflow/RCR%20Workflow.state.s4"/>
    <dc:title>Apply</dc:title>
    <rtc_cm:iconUrl>...</rtc_cm:iconUrl>
</rtc_cm:Action>

As everything but the state transition seems to work, I wonder what's wrong.

If someone could help or give me lead, it would be amazing!

Thanks.
Nico