Originally posted by P-funk
What you are doing wrong is putting to many limitations on your self. It sounds like your body has adapted to the training stimulus you have been giving it ove rthe past years (ie the same weights for the same rep ranges week in and week out). Mix up your rep ranges more. Try lifting heavy sometime and do sets of 4 reps or three reps or even two reps!! Quite trying to stick to the same workout all the time. You body need variation to prevent accomodation and to keep on growing and making progress.