GET/PUT communication between two CP-1543-1

Hi, as you can see from title I have troubles establishing S7 communication between two CP-1543 communication processor modules. Everything works when using X2 ports on S7-1500 PLCs, but it refuses to work on CP-1543.

I tried changing slot number to 2 for a partner in a master PLC but id didn't work.
Any idea what might be the problem?

Did you change the address of the card?

Yeah, I did, I set different address for CP card.
Anyways, there should not be problems, this is possible?