3300AP Duplex Problem

Hi All, we've got a duplex problem, the problem is that lift A does not answer any hall calls, unless the lift B is switched off. No errors reported.

(Schindler had removed the chip card from Lift A. We've bought a new replacement from china). The SIM card has the duplex feature programmed.

Has anyone encountered these issues? Or know if it's a grouping cable issue or parameter problem?

Thanks. TKenya.

Program each car hall calls separate do A unplug B then reverse