Java EE (Java Enterprise Edition) General Discussion

Trying to connect to MQQueueConnectionFactory with queueConnectionFactory.createQueueConnection() gives me JMSException with LinkedException:

MQJE010: Unknown host: NT503
MQJE001: Completion Code 2, Reason 2059
com.ibm.mq.MQException: MQJE001: Completion Code 2, Reason 2059
at com.ibm.mq.MQManagedConnectionJ11.<init>(MQManagedConnectionJ11.java:166)
at com.ibm.mq.MQClientManagedConnectionFactoryJ11._createManagedConnecti
on(MQClientManagedConnectionFactoryJ11.java:196)
at com.ibm.mq.MQClientManagedConnectionFactoryJ11.createManagedConnectio
n(MQClientManagedConnectionFactoryJ11.java:213)
at com.ibm.mq.StoredManagedConnection.<init>(StoredManagedConnection.java:80)
at com.ibm.mq.MQSimpleConnectionManager.allocateConnection(MQSimpleConnectionManager.java:150)
at com.ibm.mq.MQQueueManager.obtainBaseMQQueueManager(MQQueueManager.java:649)
at com.ibm.mq.MQQueueManager.construct(MQQueueManager.java:598)
at com.ibm.mq.MQQueueManager.<init>(MQQueueManager.java:419)
at com.ibm.mq.jms.MQConnection.createQM(MQConnection.java:976)
at com.ibm.mq.jms.MQConnection.createQMNonXA(MQConnection.java:707)
at com.ibm.mq.jms.MQQueueConnection.<init>(MQQueueConnection.java:206)
at com.ibm.mq.jms.MQQueueConnection.<init>(MQQueueConnection.java:76)
at com.ibm.mq.jms.MQQueueConnectionFactory.createQueueConnection(MQQueueConnectionFactory.java:143)
at com.hoogehuys.b2b.messaging.JmsQueueReceiver.initialise(JmsQueueReceiver.java:111)

I am using MA88 for the MQ Java Client, a JNDI .bindings file to connect, with settings for the QueueConnectionFactory:
Name: QUEUECONNECTIONFACTORY
Transport: Client
Queue Manager: NT503
Port: 1414
Host Name: NT503
Channel: SYSTEM.DEF.SVRCONN

On the server (NT503) we have MQSeries 5.2.1 on WinNT4. On the server MQ and the QueueManager (NT503) is running, I can connect to the server with ping, netbios, I have enough user rights. Replacing above hostname with IPAddress doesn't help.

Does anyone has more suggestions? What could be the cause of this error? Where should I look to solve this?

I didn't find any information on IBM's website about this problem.

Dirk