Part within Assembly showing in drawing

Hi all, well this is really the first time I ran into any problems while making a drawing and it's exactly as it sounds. Two parts that are inside of my assembly are showing in the drawing and I don't know as to why. The first file that I created initially didn't show anything but when I created another drawing using the same assembly just a different configuration two parts end up showing and I don't know how to go about hiding them again. And the drawings have to be black and white, I did see if those same parts would show if the valve was colored and while it was colored the two parts didn't show. So if anyone can help me with this problem I'd greatly appreciate it.

Mauro

SolidworksDrawings And Detailing