Is this field "optimized for interactive content"? If so, try changing this data format option to "optimize for images" and see if you can then get it to print.
For More Information see: http://forums.filemaker.com/posts/9b3a2c7571?commentId=266047#266047
This is one of many acknowledged bugs that can be found in the Known Bug List thread here in the Report an Issue section of the forum.
It can also be downloaded as a database file from: https://www.dropbox.com/s/jt09b82i0xijbu3/FMP%20Bugs.zip
Optimized for interactive content makes it not render as PDF
Which is why I suggested that for printing purposes, you select the other data format option: "Optimize for Images".
Right, but that still doesnt print the physical image.
Are you using Mac or Windows?
It is my understanding that if you use Insert Picture on a Mac system, you can insert the PDF and get an image of the first page of the PDF.
On windows, you may be stuck with the need to capture and insert a screen shot of the first page of the PDF before you can use it for printing like this.
On a side note, I ask some pretty dumb questions, I apperciate your help all the time lol