Installing OpenWrt on Fritz!Repeater 3000

Hello,
I have now taken a few steps further:
I could go with you:
./eva_ramboot.py --offset 0x85000000 192.168.178.1 uboot-fritz3000.bin
... access the fritz.repeater.

The next steps of the manual:

... I followed.

Which is the problem:
After changing the IPv4 of my computer (192.168.1.70) I can also ping the fritz.repeater (192.168.1.1)
But I cannot access the fritz.repeater via ssh, so the scp commands do not work.

Can anyone else give me a hint here?
I would be grateful for it.