CM21 user defined field empty

Dear guru ,

I need to add a new field in CM21 for the capacity requirements list.

I have implemented user exit CYPP0005.

I have added this field in structure CYUSER.

I have used FM EXIT_SAPLCYPP02_001 to write the code for populating the field with the value i want.

But if try to execute CM21 the field appears but itu2019s empty.

What I forgot ?

Can you help me ?

Thanks.