Shift knob!! Wont come off!

When I got my GSR it had the annoying Razo shift knob on it. It has no grip, it is just like a metal tube like design. Anyway, I personally like the factory knob (plus the Razo is chrome ) and I bought it today. Well now what I thought was as simple as unscrewing the Razo isnt. It wont turn at all. I have used all my strength. Anyway, Does ANYONE know how to take this damn thing off? I also cant install my Teg Type R shift boot until this thing comes off...