If you are still running your MQ environment using WebSphere MQ v6 then you are using unsupported software!!
WebSphere MQ v6 End of Service date was September 30th, 2012 (just over 2 weeks ago).
http://www.ibm.com/software/websphere/support/lifecycle/
So, if you are running WebSphere MQ v6 and you have a problem, “who you gonna call?” – nobody because IBM no longer supports WebSphere MQ v6.
Therefore, don’t procrastinate anymore, upgrade to WebSphere MQ v7.0.1 or v7.1 or v7.5 ASAP.
Regards,
Roger Lacroix
Capitalware Inc.