How to delete record from table control using BDC?

Hello friends,

I am running a BDC program to delete records.

I have file with following records and i got these records into t_itab.

Material	Plant	Start date	End date	Cost
MQ100001	S001	09/01/2008	09/31/2008	55.00
MQ100004	S002	09/01/2008	09/31/2008	56.00
MQ100008	S003	09/01/2008	09/31/2008	57.00

Now, I have BDC transaction in which table control screen which contains following structure.

MQ100001	S001	09/01/2008	09/31/2008	55.00
MQ100002	S002	09/01/2008	09/31/2008	56.00
MQ100004	S003	09/01/2008	09/31/2008	47.00	
MQ100005	S004	09/01/2008	09/31/2008	25.00
MQ100006	S012	09/01/2008	09/31/2008	76.00
MQ100007	S033	09/01/2008	09/31/2008	17.00
MQ100008	S011	09/01/2008	09/31/2008	95.00
MQ100009	S002	09/01/2008	09/31/2008	46.00

I have recorded from SHDB in which first record will be delete.

So, when i loop through t_itab,instead of deleting MQ100001,MQ100004 and MQ100008 from BDC screen,

it is deleting MQ100001,MQ100002 and MQ100004 (first record for each process ).

Which i don't want to.

Is there any facility in BDC to put records on top which i want to delete?

Please guide me.

Regards,

RH