Mpl Loader?

A few files I have downlaoded have stopped working when I got the new set of codecs. It comes up with a message saying" the DLL mplapx.dll can not be loaded. os reports the specified module could not be found." then it crashes kazaa. This is rather frustrating, can I get this module somewhere or what? Any thoughts?
ps whoever it is that monitors this forum and answers all the questions has been doing a great job, thanks a lot!