You want to connect midiox event port to loopmidi driver (usually as easy as selecting the device from options -> midi devices -> midi outputs), then click the wee virtual keyboard button and you should see keyboard/midi messages going from one place to another all inside of midiyoke. Oh then this: or some other virtual keyboard outside of buzz, this one works well with the above driver.
Just get this and setup one or more virtual midi devices. I created a test that successfully shows the problem.