Setup Group not updated in PDS

Hi

We are trying to change the setup group of a set up phase for a product in receipe using Engineering change number in ECC, there is Finish Start relationship between setup phase and produce phase.

The data is then transferred to APO . In APO when we dispaly the PDS the the setup group is not updated for produce activity.

All the operations and both the phases are valid during this period and they have FS relationship also.

Kindly suggest.

Regards

Amish