BAPI_ACC_DOCUMENT_POST- GL account problem

Hi to all,

I am trying to use BAPI_ACC_DOCUMENT_POST in a program and I am using GL Account number of a Customer but when I execute the bapi It gives an error such as

'Account 'XXX' in company code XXX cannot be directly posted...' .

Can I send the customer number instead of the GL account number for customer?

Thanks.