BAPI issue while creating SO with Config materials

Hi all,

I was facing an issue with BAPI for creating Sales order.

Iam using BAPI_SALESORDER_CUSTOMERDATA2, passing all parameters correctly but if the material is Config then Sales order is not created.

for other materials i can able to get SO no.

there are no return parameters with error Header and Items are successfully .

i debug the BAPI some where it is crearing VBAK internally .

Please suggest me what i can do .