Kitty Problem!! Please Help!!?

[SnoopiePoopie]

So i live in a two part house. Down stairs is were someone else lives and i live upstairs. We put a board up so my 6 month old kitten wouldn't go downstairs. But she keeps jumping up and going down. We don't have a door and i keep going downstairs to get her, and i don't like it. She's been sprayed, flicked and punished but nothing helps. She is going to get her fix soon and my sister said she will calm down. Please tell a good answer to my question... How do i stop her from going down there all the time? How do we punish her?

(sry soo long)

 

[JackS]

Try putting lemon juice or smell on the stairs. Animals hate the smell and try to avoid it