vst~ message "presetnames" not working

Using the above patch and providing a vst that has vst presets, sending the vst~ object the message "presetnames" should give me a list of presets sent out the right outlet, but it doesn't. Also, any of the preset recalling messages (int, float, symbol) fail to call up the respective preset. Also, loading a preset as the 2nd optional argument after the vst name fails to load the preset.
I've seen other solutions, e.g. working with preset, but I'd prefer using what vst~ provides out-of-the-box.