Hi Solidsnake, the reason it will not work is because some of the internal working of winmx have changed since that last release, thats the good news , but on to the bad..
I never advise folks to use this program anyway because it wastes a lot of network resources in searching too frequently, although it does have other useful functions, after the last release the developer was bombarded with a large amount of annoyed emails so the program was not developed further.
So it looks like I cant help you in this case.