vbSEO - not great success

I have been running vbSEO at my forum: AdminFuel - Discussion and Resources For Forum Administrators

I haven't been getting great results though. I have been running it for quite a while, and well my Google results have dropped from 7000+ to only 300.
Is it something with the settings? Am i missing something?

I have checked your site SEO and vBSEO Settings and that's seems you want some changes in your vBSEO Settings However I see you have increase in your traffic and keywords Also the forums administrators and developments sites take long time to see some improvements because they haven't the good number of threads that's can get the traffic if you compare your site to any other site you may have 3 or 4 new threads daily and in the second forum have more than 60 thread daily so that's should take long time to see effect

I recommended to open new critique thread to discus this a bit more

Which changes? And where should I submit?

Open new thread here with your forum URL : vBulletin SEO Discussion - Critique Please at vBSEO.com