MQJMS2013: Error while using Transport Mode as Client in WAS 6.1 with MQ

[Anush Malhotra]

Hello All,
Need an urgent help, did try the net for any info on this but the solutions are specific to using the Transport Mode as Bindings.

We are using the transport Mode as Client and are getting this error.

javax.jms.JMSSecurityException: MQJMS2013: invalid security authentication supplied for MQQueueManager.

Any links or pointers to this will be of great help.