[Solved] Note Volume Preset To 0

I’m using the latest renoise demo version to get to know the program and today I encountered a serious problem.
Somehow renoise presets the volume column to 00 on any note I play. This also affects pre-hearing of samples; I can play them by the “sample keyzones”-tab keys but playing by keyboard doesn’t make a sound.
I can’t find a hotkey or setting to change this and it really makes the program useless at the moment.
Please, tell me how to fix this.

Yes! That was it. Thank you so much. I guess it was good to learn this now than never.