I've had several wordpress sites with SEOPressor for over half a year. I optimized the best pages and posts with SEOPressor up to 80%-100% with a KWD of 3-4%, but they went pretty much nowhere and I found out why earlier today. The obvious (well, now it's obvious lol) thing that eluded me was that Google's bots read the whole pages as opposed to just posts and page content, so when I got Firebug+SenSEO on Firefox, it turned out that the KWD in the post/page content, the header, sidebars and the footer (with the SEO Search Terms plugin) added up to about 17-20%. Epic facepalm. So yeah, if there's anyone out there as stupid as I am, be warned lol. On a sidenote, it looks like SEOPressor doesn't see your title on posts as an H1 (while google's bots do), but pages seem ok
I guess SEOpressor does tell you that the content is too low, and if not, you still should never cross 4-5% KW density. So I guess you need to add more content in your pages first
I use Easy WP SEO, it is just like SEOPressor but a lot better. It uses entire page and not just post content to figure everything out. I also move the KWD from 3-4% to 1.5% target. It does a lot more as well, but SEOPressor's Daniel Tan says the new version will blow anything out of the water when it is released.