Ableton Live's M4L Connection Neopixel Ring 24 LED Arduino UNO Issue

Hello everyone

Currently I am experimenting with Ableton's M4L Connection Kit, Arduino Uno and the Neopixel Ring 24 LED WS2812. I want to manipulate the Neopixels LEDs with the audio from a track (Which I am doing with M4L Envelope follower). In the following example: https://www.youtube.com/watch?v=Dx21zvVgEvg , the LED Strip colors responds on audio. I want to reach a similar effect, (changing colors on different frequencies and making the LED's dim on different volume for example).

I cannot make the Neopixel respond. I tried to make a servo respond on a tracks audio, and this worked without any problems. I also tried a single LED, this worked without problems as well. However I made the Neopixel respond with one single LED when I cranked up the gain and fall on the Env Follower .

I am using the Standard Firmata script (worked fine with the single LED and servo).
Does anyone know why I the Neopixel doesn't work with the Connection Kit? I really want to make it work.

Thank you in advance.