unfortunately I went wrong converting my Cherry G80 with a ProMicro using Soarer's keyboard converter. Now, I cannot find my mistake. Maybe somebody can help me

As it is shown in the pictures I have soldered wires to the board an connected them to the ProMicro:
red: GND
orange: 2 (=PD1, clock)
yellow: VCC
green: 3 (=PD0, data)
The firmware flashed to the ProMicro is:
Soarer_at2usb_v1.12_atmega32u4.hex
When connecting the keyboard to the computer, all three leds light up for a moment and afterwards nothing is going on.