Trouble transferring planned orders from R/3 to APO

Currently we are generating planned orders in R/3 via the MPS planning runs, which we would like to send to APO-DP for use in the S&OP process. We are able to pass Preqs and POs to APO using the CIF, but unable to transfer planned orders.

Material master settings are as follows:

Material '123' at Plant 'A'

MRP Type = M2

Procurement Type = F

Special Procurement key = source from plant 'B'

All materials and plant locations have been sent to APO via a seperate integration model. I have also configured the Global SNP Settings to "Allow transfer from SAP R/3 for all planned orders".

Any suggestions as to how this issue can be resolved would be greatly appreciated.

Regards,

Eric