CV01N-CV110001 user exit problem

Hello Experts,

I need to create a new tab in CV0*N screens. So I created a project and assigned CV110001 to it. And then I created the subscreen and in the EXIT_SAPLCV110_001 exit I made the screen visible.

I appended a new field to DRAW table (ZDOKVR type CHAR(4).

On SE51 I added the field and named it DRAW-ZDOKVR. But when I try to select from DRAW table in the dictionary that ZDOKVR field seems to be locked.

Now I am having a problem to pass values and recieve values from screen.

I am trying to MOVE PS_DRAW-ZDOKVR TO DRAW-ZDOKVR command but system response is DRAW is unknown. If I define DRAW like DRAW then there is no connection with my field and DRAW structure.

What is missing in my process. Please guide me.

Best regards,

Arda