The last couple of weeks, I did lower weight with higher reps on all machines and free weights.
This week, I'm doing more weight, increasing weight until 3rd set... 10 reps at least.
I have also been doing 20 minutes on the recumbent bike; I think that's helping break through the fat! Haha. 10 minutes on the elliptical before weights... 20 minutes on the bike... and 30 minutes on the treadmill - with a mile of that on 10 elevation. Sometimes life run after that... sometimes I just walk fast.
I am about the same weight; between 156-160lbs. Guess it takes a while to see major results when you've accumulated a good layer of fat :-P