SDL Trados 2007 problem with PDF coding... How can I see all tags? Some of the tags are missing and I can see mistakes in my PDF view. I re-check the tags, but it doesn't work. Can you give me any advice?

How can I see all tags? Some of the tags are missing and I can see mistakes in my PDF view. I re-check the tags, but it doesn't work. Can you give me any advice?