Color dropping out on placed pages
I am working on a booklet and I am running into a weird problem. In order to keep the price down I had to convert the guts to gray scale. I was able to do that just fine however when I tried to add the color pages back in I run into a problem where some of the colors drop out. I have done anything to the cover pages beside extracting and adding them back in so Im not sure why anything would change. The other odd thing is only some of the colors drop out. Here is an example. The first is what the color cover should look like and the second is what it looks like when I reinsert it. I am using Acrobat pro 11 on a mac. 
