i know we have the weapons on offense

I have a question to ask, why are we not gettin the ball to joe horn in the red zone? for years since he's been here as long as brooks was around, when we were in the red zone, every arm-chair coach in the world knew that if we didn't run the ball in it would go to joe horn in the endzone, and (just estimating) he would come down with it 80%-85% of the time. Today he caught a 71yd td between 3 defenders and I may have saw maybe 2 or 3 more passes to him,( i remeber he dropped a third down pass)is it he isn't getting open or drew brees doesn't have enough faith in his arm to try to get it to him in tight spaces or he doesn't think he may come away with it?