How to send PDF attachment by email to different customers using cl_bcs ?

Hello Experts,

I have a requirement to send  pdf attachment by email to different customers using cl_bcs global class.

But when I am trying to send all the documents are going to all the customers.

Example :

Customer no1. : 100000     Sales Ord. : 2001.

Customer no1. : 100001     Sales Ord . : 2002.

Here the problem is when I try to send the mail , both the sales ord.details (2001 and 2002) are going to both customers it is wrong.

My requirement is customer no. 100000 should get  2001 Order details and Cust.100001 should get Order 2002 details.

Please suggest.

Thanks in advance,

Venkat.