1. You dont use the last screen thats vbulletin integration not SMF
2. My suggestion to to suggest you make sure you have the application installed correctly as when you install you make sure the user database portion has your smf database info and on the 4th step of install you select SMF as the integration and enter your forum table prefix usually smf_. The errors you note make me thing you have incorrectly entered one of those two things.
3. same thing as number 2
essentially if you wish support please post a url here so we see your classifieds to see what you have.