BADI is not working

hi all,

i made an Implementation for BADI 'BADI_GTIN_VARIANT' for tcode MM01 for making default value '03' in view 'sales organization1' during material creation, but problem is that value is coming during debug but it is not showing on screen, so can anyone please help me?

i m writing code :

if sy-tcode = 'MM01'.

mara-mstav = '03'.

endif.

regards saurabh.

Edited by: saurabh srivastava on May 5, 2009 9:23 AM