ME21N - want to add item automatically

Hi Guyz,

While creating PO through ME21N , say i am going to enter 2 items...

say in item 00010 material MAT1

and in item 00020 material MAT2.

Now I want to check the item 00010 material MAT1 if its having BOM : MAT11

i want to add that material as item in PO as item 00011 material MAT11....

like that i have to check for item 00020 material MAT2.......

any BADI is there ?

i tried below badis but no use...

ADDRESS_SUBSCREEN

ME_CCP_ACTIVE_CHECK

LUMER_BADI_ROUND_INT

BADI_SD_ROUTE

MD_STOCK_TRANSFER

ME_DEFINE_CALCTYPE

ME_PO_PRICING

ME_PO_PRICING_CUST

REFERENCE_SITE

ME_TRIGGER_ATP

ATP_PUBLISH_RESULTS

CHECK_COBL_ADDON

Ramesh...