I don't know how you have your specific things routed and I can't understand the non-english sections, so for the VERY LAST TIME.
In the F4 connections you need a SPDIF input and SPDIF output, both as STEREO busses. These should be linked to your interfaces' SPDIF In/Out connections.
Cable 1 goes Interface SPDIF output to KPA SPDIF input.
Cable 2 goes from KPA SPDIF output to Interface SPDIF input.
DI signal on track 1. Set track1's out to SPDIF L. This sends the DI signal to SPDIF output connected to the Kemper but you ABSOLUTELY MUST have the Kemper set to SPDIF Input on the unit itself. Push the "Input" button on the far left, and then on the screen there will be a box that says "SPDIF input." Check the box by using the button on the Kemper's left side of the screen, right above that text.
On new track (for KPA signal), set input to whichever SPDIF side has the amp signal. This depends on your Kemper OUTPUT settings. Rout the track output to wherever you want it to go in your project.
That's literally it. It's the simplest procedure I've ever done for reamping guitars and if you can't figure this out from these instructions then I don't think production is for you.