Thought that the error might have been thrown due to the fact that I might be using a wrong version of the mqcontext.jar?
I can't speak to that as I don't know the compatibility matrix for IBM jars and servers.
So in looking at everything I have setup it seems correct?
Yes.
This exception is probably from the mqcontext.jar right?
I can't say for sure since I don't know the specific contents of all the IBM jars, but if I had a guess then I would say yes.