Websphere MQ in netweaver

hello,

trying to integrate Websphere MQ into netweaver i do encounter some problems. though i followed this very precise reply

how-to-integrate-websphere-mq-as-an-external-jms-p

it still doesn't quite work for me. i guess i'm missing some configuration issues, as my factory-type property for example is "unknown". shouldn't the type be specified? and when, how to do that (i tried to specify the type in the xml but it remains unknown)? well, afterall i allways get the following error when trying to start the Connector:

Invalid factory: IBM_Queue_Factory -> com.ibm.mq.jms.MQXAQueueConnectionFactory

i really appreciate any hint,

thanks patrick