The RC = 49 means AMRC_TRANSPORT_ERR which means that, in this case, the MQCONN has failed for some reason. The RC2 is the return code from MQ but I don't know what the 6000 means as it isn't ...
The only mq api which supports JTS/JTA coordination is JMS.
The mq base java classses can use MQ as a coordinator with some restrictions.
The AMI only allows MQ resources to be coordinated from Java
The AMI does allow you to do these
1. Passing context: set the message context attribute in the general section of the policy to 'Pass Identity' or 'Pass all'. You need this set in the policy ...