Issue in binding of the workflow task

Hi All,

I am facing the below issue -

I have created a custom method in my BOR object - ZBUS2007. I have attached the screenshot of import/export parameters. I have used the below code inside my method -

CALL FUNCTION 'ZGET_NEXT_APPROVER'

     IMPORTING

       ZAPPRLVL = ZAPPRLVL

     TABLES

       AC_CONTAINER = ACCONTAINER

       ACTOR_TAB = ACTORTAB

     EXCEPTIONS

       OTHERS = 01.

   CASE SY-SUBRC.

     WHEN 0.            " OK

     WHEN OTHERS.       " to be implemented

   ENDCASE.

Now, when I am trying to do the binding of my task, i cannot find my parameter ZAPPRLVL in the binding parameters. Attach is the screenshot.

What am I doing wrong ?

Regards

Meenakshi.