How to enable Meta Keywords Editor in SEO Ultimate?

I must say SEO Ultimate is a very good wordpress seo plugin,I used it for a long time,it works well before.But today when I install it on a new blog,I found that I can't enable Meta Keywords Editor and Nofollow Manager .Yes,I clicked the enable button,but no use.Anyone knows what's the reason?How can I enable them?

No doubt that plugin is just great for SEO reason. And that is quite famous also. May be you try that after sometime so that it works. I think the problem is temporary, And for the time being you can use other SEO plugins of WP.

With SEO Ultimate, when you click on the "Enabled" button for Meta Keywords Editor it does not enable the Meta Keywords Editor.