change the Middle C to C4 in the EM and then your switches will match the BBC values as it, like many other libraries, uses C4. The artificial harmonic works fine here – please check you have it set correctly in Properties as in the screenshot below. If it still doesn’t work, then reapply the Playback Template and if still no joy, pls. attach the actual project for checking just in case you’ve made some unintended change.
glad it’s now working. There’s no need of course to change the middle C – it’s just easier for checking that the EM (esp. if you go on to create your own) actually matches the keyswitches set in the library.