Are you choose File > Export > Adobe PDF? Did you choose a PDF preset? What was it? If it failed, exactly what message did you get?
Yes. High Quality Print. "Failed to Export the PDF file"
There is probably a corrupted element on one of your two pages. Quite likely it's a bad font or a bad graphic.
Try deleting your graphics one by one, and create the PDF again until you determine which one is causing the problem. Try resaving the graphic in Adobe Photoshop in a different format (PSD is best) if possible.
For fonts, try substituting a different font if necessary.
Yep, it was one of my fonts. I just reinstalled it, and now it's good.