urgent help needed in xd01

hi,

i'm trying to add custom fields in XD01.. we have 6 tabs in the second screen in XD01.. it should come in 7th tab..

for this in the PREPARE MODIFICATION-FREE ENHANCEMENT OF CUSTOMER MASTER RECORD in SPRO, i have created one screen group 'Z1' and inside that screen group i have passed parameters NUMBER : 7, and FCODE : ZNEW

and i have implemented the method 'CHECK_ADD_ON_ACTIVE' in the badi 'CUSTOMER_ADD_DATA' writing the following code :

IF I_SCREEN_GROUP = 'Z1'.

E_ADD_ON_ACTIVE = 'X'.

ENDIF.

but in the second screen in XD01, i found that tab is not getting displayed.. wht could be the problem..

thanks