When registering a system using a rhproxy I get "Unable to read certificate file RHN-ORG-TRUSTED-SSL-CERT" in the servers logs

Issue

On a new setup satellite and rhproxy, I try to register a system using the proxy using this command:

/usr/sbin/rhnreg_ks --force --activationkey <somekey> \
  --serverUrl=https://satellite.example.org/XMLRPC --sslCACert=/root/RHN-ORG-TRUSTED-SSL-CERT 

This fails and on the rhproxy in file /var/log/httpd/errorlog this appears:

[error] \tX-Up2Date-Version: 4.9.1-29.el4
[error] \tmod_wsgi.application_group: satellite.example.org|/xmlrpc
[error] \tmod_wsgi.callable_object: application
[error] \tmod_wsgi.handler_script:
[error] \tmod_wsgi.input_chunked: 0
[error] \tmod_wsgi.listener_host:
[error] \tmod_wsgi.listener_port: 443
[error] \tmod_wsgi.process_group:
[error] \tmod_wsgi.request_handler: wsgi-script
[error] \tmod_wsgi.script_reloading: 1
[error] \tmod_wsgi.version: (3, 2)
[error] \twsgi.errors: <mod_wsgi.Log object at 0x7fe1ccc636b0>
[error] \twsgi.file_wrapper: <built-in method file_wrapper of mod_wsgi.Adapter object at 0x7fe1cd337648>
[error] \twsgi.input: <mod_wsgi.Input object at 0x7fe1ccc635f0>
[error] \twsgi.multiprocess: True
[error] \twsgi.multithread: False
[error] \twsgi.run_once: False
[error] \twsgi.url_scheme: https
[error] \twsgi.version: (1, 1)
[error] Extra information about this error:
[error] Unhandled exception type
[error]
[error] Exception Handler Information
[error] Traceback (most recent call last):
[error]   File "/usr/share/rhn/proxy/apacheServer.py", line 66, in __call__
[error]     ret = f(req)
[error]   File "/usr/share/rhn/proxy/apacheHandler.py", line 341, in handler
[error]     ret = handlerObj.handler()
[error]   File "/usr/share/rhn/proxy/broker/rhnBroker.py", line 206, in handler
[error]     self._connectToParent()  # part 1
[error]   File "/usr/share/rhn/proxy/rhnShared.py", line 117, in _connectToParent
[error]     self.responseContext.getConnection().connect()
[error]   File "/usr/lib/python2.6/site-packages/rhn/connections.py", line 221, in connect
[error]     self.sock = SSL.SSLSocket(sock, self.trusted_certs)
[error]   File "/usr/lib/python2.6/site-packages/rhn/SSL.py", line 38, in __init__
[error]     self.add_trusted_cert
[error]   File "/usr/lib/python2.6/site-packages/rhn/SSL.py", line 63, in add_trusted_cert
[error]     raise ValueError, "Unable to read certificate file %s" % file
[error] ValueError: Unable to read certificate file RHN-ORG-TRUSTED-SSL-CERT