Problem with the inbound Idocs once place a Business system into a party

Hi Experts,

      I created a Business System into the LSD (its a 3rd party system) and I create some communication channels to send and receive Idocs.

     All was working, but for following some "good practices", I decide to include this Business System into a party.

     I'm able to send Idocs from our PO system into this 3rd party system without any problem. But once this 3rd party try to send Idocs, the Idocs get stacked in the SM58, with the following error:

     Commit fault: ASJ.ejb.005043....

     Our system is: SAP PI 7.31 JAVA Stack only SP Stack Number 08.

     Is there any missing configuration that I should do?

Thanks in advance

Regards.