Changing runtime behaviour of BADI implementation

hello ,

I am creating an implementation for the BADI using method  cl_enh_tool_badi_impl-> add_implementation , saving the implementation using  if_enh_object~save and activating using  if_enh_object~activate.

when i check the BADI in SE18 , BADI implementation is active , but the runtime behaviour of BADI says 'The implementation will not be called'.

How do I set this to 'Execution depends on runtime filter values' using a method call ?

Regards

Supritha Rao