Hey Saturation, Did you make progress? I'm new with the Keylab 49 myself, one place to check is that under Options/Preference in the Link MIDI section you choose your keylab for control surface, input, and output. The other thought is did you choose the Analog Lab 2 under the Plug-ins section? You can double click it or drag / drop it into session view. It should then open an Analog lab window within Ableton Live.
Let me know if you already solved it!