Addition: the ccm.log is filled with these warnings:
2012-02-15 10:03:43,409 [ Thread-979] WARN org.apache.http.impl.client.DefaultHttpClient - Authentication error: Unable to respond to any of these challenges: {oauth=WWW-Authenticate: OAuth realm="Jazz%20Team%20Server", oauth_signature_method="HMAC-SHA1", oauth_signature_base_string="GET%26https%253A%252F%252Frtc1.semaphor.dk%253A9443%252Fccm%252Frpt%252Frepository%252Fworkitem%26fields%253Dworkitem%25252Fcategory%25252F%252528projectArea%25252FitemId%25257CuniqueId%25257Cmodified%25257CitemId%25257Carchived%25257Cname%25257Cdescription%25257CcontextId%25257C%252540href%25257CqualifiedName%25257Cid%252529%2526modifiedsince%253D2012-02-15T00%25253A00%25253A00.000%25252B0100%2526oauth_consumer_key%253D057e0d369c2d478cb95ef1167b6a155f%2526oauth_nonce%253D404061766308434150%2526oauth_signature_method%253DHMAC-SHA1%2526oauth_timestamp%253D1329296623%2526oauth_token%253D%2526oauth_token_secret%253D%2526oauth_version%253D1.0%2526size%253D100", oauth_problem="signature_invalid", oauth_signature="81GqiF3eGGlcQw8XKrl2p3f880k%3D"}
2012-02-15 10:03:43,597 [ Thread-979] WARN org.apache.http.impl.client.DefaultHttpClient - Authentication error: Unable to respond to any of these challenges: {oauth=WWW-Authenticate: OAuth realm="Jazz%20Team%20Server", oauth_signature_method="HMAC-SHA1", oauth_signature_base_string="GET%26https%253A%252F%252Frtc1.semaphor.dk%253A9443%252Fccm%252Frpt%252Frepository%252Fworkitem%26fields%253Dworkitem%25252Fcategory%25252F%252528projectArea%25252FitemId%25257CuniqueId%25257Cmodified%25257CitemId%25257Carchived%25257Cname%25257Cdescription%25257CcontextId%25257C%252540href%25257CqualifiedName%25257Cid%252529%2526modifiedsince%253D2012-02-15T00%25253A00%25253A00.000%25252B0100%2526oauth_consumer_key%253D057e0d369c2d478cb95ef1167b6a155f%2526oauth_nonce%253D6813392386170497731%2526oauth_signature_method%253DHMAC-SHA1%2526oauth_timestamp%253D1329296623%2526oauth_token%253D%2526oauth_token_secret%253D%2526oauth_version%253D1.0%2526size%253D100", oauth_problem="signature_invalid", oauth_signature="k7RCZnPXvMAxXuXLt6opjF4TSBk%3D"}
2012-02-15 10:03:43,804 [ Thread-979] WARN org.apache.http.impl.client.DefaultHttpClient - Authentication error: Unable to respond to any of these challenges: {oauth=WWW-Authenticate: OAuth realm="Jazz%20Team%20Server", oauth_signature_method="HMAC-SHA1", oauth_signature_base_string="GET%26https%253A%252F%252Frtc1.semaphor.dk%253A9443%252Fccm%252Frpt%252Frepository%252Fworkitem%26fields%253Dworkitem%25252Fcategory%25252F%252528projectArea%25252FitemId%25257CuniqueId%25257Cmodified%25257CitemId%25257Carchived%25257Cname%25257Cdescription%25257CcontextId%25257C%252540href%25257CqualifiedName%25257Cid%252529%2526modifiedsince%253D2012-02-15T00%25253A00%25253A00.000%25252B0100%2526oauth_consumer_key%253D057e0d369c2d478cb95ef1167b6a155f%2526oauth_nonce%253D3709142066382760125%2526oauth_signature_method%253DHMAC-SHA1%2526oauth_timestamp%253D1329296623%2526oauth_token%253D%2526oauth_token_secret%253D%2526oauth_version%253D1.0%2526size%253D100", oauth_problem="signature_invalid", oauth_signature="XuuxkpepqSMgay8f8pliWisP0fk%3D"}
2012-02-15 10:03:44,028 [ Thread-979] WARN org.apache.http.impl.client.DefaultHttpClient - Authentication error: Unable to respond to any of these challenges: {oauth=WWW-Authenticate: OAuth realm="Jazz%20Team%20Server", oauth_signature_method="HMAC-SHA1", oauth_signature_base_string="GET%26https%253A%252F%252Frtc1.semaphor.dk%253A9443%252Fccm%252Frpt%252Frepository%252Fworkitem%26fields%253Dworkitem%25252Fcategory%25252F%252528projectArea%25252FitemId%25257CuniqueId%25257Cmodified%25257CitemId%25257Carchived%25257Cname%25257Cdescription%25257CcontextId%25257C%252540href%25257CqualifiedName%25257Cid%252529%2526modifiedsince%253D2012-02-15T00%25253A00%25253A00.000%25252B0100%2526oauth_consumer_key%253D057e0d369c2d478cb95ef1167b6a155f%2526oauth_nonce%253D-5081203698052747221%2526oauth_signature_method%253DHMAC-SHA1%2526oauth_timestamp%253D1329296623%2526oauth_token%253D%2526oauth_token_secret%253D%2526oauth_version%253D1.0%2526size%253D100", oauth_problem="signature_invalid", oauth_signature="J9KeaSjtEPgOsifSEe7fjw0lnbo%3D"}
2012-02-15 10:03:44,271 [ Thread-979] WARN org.apache.http.impl.client.DefaultHttpClient - Authentication error: Unable to respond to any of these challenges: {oauth=WWW-Authenticate: OAuth realm="Jazz%20Team%20Server", oauth_signature_method="HMAC-SHA1", oauth_signature_base_string="GET%26https%253A%252F%252Frtc1.semaphor.dk%253A9443%252Fccm%252Frpt%252Frepository%252Fworkitem%26fields%253Dworkitem%25252Fcategory%25252F%252528projectArea%25252FitemId%25257CuniqueId%25257Cmodified%25257CitemId%25257Carchived%25257Cname%25257Cdescription%25257CcontextId%25257C%252540href%25257CqualifiedName%25257Cid%252529%2526modifiedsince%253D2012-02-15T00%25253A00%25253A00.000%25252B0100%2526oauth_consumer_key%253D057e0d369c2d478cb95ef1167b6a155f%2526oauth_nonce%253D1497975935585457206%2526oauth_signature_method%253DHMAC-SHA1%2526oauth_timestamp%253D1329296624%2526oauth_token%253D%2526oauth_token_secret%253D%2526oauth_version%253D1.0%2526size%253D100", oauth_problem="signature_invalid", oauth_signature="BOq9llNbjjN%2FR8gODFzDtNgFOvY%3D"}