removing antenna 2005 Corolla

I have unscrewed my Corolla antenna as far as I can unscrew it. But it will not come out. I'm turning it counter clockwise with a wrench. It appears stuck where the nut meets the base. How do I take it out?
Ah I remember this problem. I had to vice grip through the rubber of the base of the antenna because the screw was free spinning inside of it. And then I had an issue upon install of my stubby antenna where it wouldn't seal properly. I used two wraps of silicone self fusing tape around the seam. Don't even know if it leaks under the roof....