Hmm. If you did this steps you get correct results.
1. via SE11 add field ZZRADIO to CI_P0021 structure (if this structure not exist create it);
2. via PM01 extend relevant screen of 0021 infotype and customize relevant tables especial T582C
3. go to SE51 and change layout of 0200 screen for ZP002100 and set correct values for Group1 and Group3 fields
4. Customize T588M for ZP002100 and 0200 screen