Using #CC64 for Automation doesn't work

[woelf]

Hi there,
I wanted to assign my sustain pedal (MIDI CC64) to an automation curve of a VST plugin. When I open the MIDI-Learn panel of this certain curve and press the pedal - nothing happens. I double checked the CC64 input via ReaControlMIDI -> Control Change Enable -> Hold Pedal (CC64)
There the signal changes, when I press the pedal. It also works well on any VST instrument but not for automation.
[EDIT: Midi input has been configured thoroughly for this device ]

Do you have any idea how to make this work?

Thanks in advance!