Unable to create a registration resource

[Vulcainreo]

Hello,
I expected an issue during creation of a registration resource.

This example code doesn't working (method not allowed):

print "Create a registration resource"
path = "rd?ep=node1&con=coap://local-proxy-old.example.com:5683&et=oic.d.sensor"
ct = {'content_type': defines.Content_types["application/link-format"]}
payload = '</sensors/temp>;ct=41;rt="temperature-c";if="sensor";anchor="coap://spurious.example.com:5683",' \
              '</sensors/light>;ct=41;rt="light-lux";if="sensor"'
response = client.post(path, payload, None, None, **ct)
location_path = response.location_path
print response.pretty_print()

About running instance :
python coapserver.py is started
python resourcedirectoryserver.py is also started
mongodb is also accessible by changing the coapthon/define.py file (remote host without password)

During execution of the code, I expected this error:

Create a registration resource
Source: ('127.0.0.1', 5683)
Destination: None
Type: ACK
MID: 50745
Code: METHOD_NOT_ALLOWED
Token: NM
Payload: 
None

Can you help me, I think I miss something during the coapserver + ressource directory launch ?
Thank you in advance.