Coding in Infosets /CRM segmentation

Dear All,

I have requirement where i have to filter out non usable customer group to be displayed in f4 while creating segment model.

For this I have created an Infoset joinig tables BUT000,CRMM_BUT_LNK0011,CRM_BUT_SET0010,CRMC_CUSTGRP2_T

Here we require to filter out the values of group2 , whose description is 'not use'.

To achive this, i have wriiten code in Record processing block ( Extra->code section )

CHECK CRMC_CUSTGRP2_T <> 'not use'.

But this filter/check is not working .

Request you to suggest how can we get the desired f4 display.  ( Permanent filter )

Regards,

Kritika