Add custom field to search help Change Documents

Hello friends.

I need add custom field to search help Change Request Mgnt - Change Documents.

I enhance Component = AIC_CMCD_S, View = SearchQueryView, Node = SEARCH.

Base Entry = BTQAICSearch.

I did all of need (add to structure, move to right on Configuration Tab, etc). Field do view on SM_CRM web view.

I z-implemented badi CRM_BADI_RF_Q1O_SEARCH, but filter value = BTQAICSearch has implementation ES_AI_CRM_IM_SEARCH, and I cannot create new implementation (z-) with this filter value.

What to do now ?

Please, help.