If you are looking for what scale to use over this chord you can not go to far wrong with using the chord's pentatonic scale. That gives you three chord tones and two safe passing notes to draw your melody notes from, and as the melody line and the bass line should share like notes - this gets it done.
I mentioned melody. There has to be some melody in there somewhere ....... Can you play Happy Birthday by ear? Yes we have to start with our patterns, pentatonic scales do this quite well, listen to what is said in this "Masters Class" about what lies beyond those patterns. Let the melody be your guide.
http://www.metacafe.com/watch/455290...hnique_part_2/
If you answered no to Happy Birthday, start there - one new tune by ear each day - total of 3 each week. Some Where Over The Rainbow, stuff like that right at first.