Custom fields in Can't Find screen

Hi,

We have installed the new SRM UI addon and I am trying to add custom field ZZTEST in Can't Find screen using the cookbook by getting access key and adding fields directly to /SRMNXP/INCL_CUS_MINISC_ITM structure. And then adding the field to UI using configuration. I am able to see the field in metadata.

But in Can't find screen when I try to add an item its giving error as Property ZZTEST is invalid. Through debugging came to know that this field is not at all getting picked from the structure.