PI Seeburger EDI configuration error

Hi All,

I am getting below error in a B2B- Seeburger EDI scenario which we are sending an invoice to partner and partner sending an MDN back

SEEBURGER AS2: AS2 Adapter failure # Failed to get configuration from DTREQUEST and DATABASE. Reason : No report channel and/or sender agreement for AS2 sender 'RDCDRG' and AS2 receiver 'ABC' without subject found, but SYNC MDN is requested!

Can anybody help me to fix this error...