Getting Several SPAM Blogs with Anti-Slog

Hello,

I have been using your Anti-Slog plugin on several of my sites for a while. Up until a couple weeks ago it was working great.

However, now I am getting several new spam blogs per day. it also appears that if I get a spam blog on one of my installs, I will also get one at the exact same time on another.

Is there a setting or something I need to do to restrict these more?

Thanks,
Chris