Well it is authorization error on client connection. No doubt about that. See here for troubleshooting technote.
For start make sure that user which are you using is given proper rights (it isn't). Make sure that you are not using MQ administrator account with WMQ v7.1 or newer. Since 7.1 MQ Administrators are not allowed to create client connection with default configuration. This default can be changed. See here.
One option is to use MCA user on client channel. This overrides whatever user you are passing. It is explained here.
WAS is either using different user or bindings connection mode.