Creating Sales Order from Purchase order in same system

Hi,

I have a business scenario in which i am supposed to create a sales order from a purchase order. Below mentioned are some of the key points:

1. Both the SO and PO are created in the same system but in different Company Codes.

2. I am using IDOCS to perform this activity.

3. Have maintained partner profile and other configuration settings in SAP system.

4. Inbound IDOC is triggered with the following error message "VKORG, VTWEG, SPART cannot be determined for customer P210 , vendor 0000400040".

Questions:

1. I have maintained the customer vendor record in VOE2, still the error. Please let me know the reason and possible resolution.

2. The customer number displayed in error message is not my customer. Hence, this could be the reason, the sales area is not determined from VOE2.

Please help me in getting the correct Customer number in IDOC.

Thanks