Acrobat CC doesn't show or print spot colours in a Photoshop PDF

Question

When I open a Photoshop PDF, with a spot colour channel, in Acrobat CC 11.0.04, the spot colour doesn't show. But it shows when I click Output Preview (in Print Production). The colour doesn't print either. It also disappears when I convert it into CMYK (by checking the "Convert All Spots to Process" box in Ink Manager). I'm running Acrobat on OSX Mavericks.
Has anyone had similar problems?
Any help is appreciated.

Answer 1

Thank  you for your reply.
Indeed, I tried saving a PDF that had the "default appearance", it shows exactly the same. So it looks like it "can't" show the image.
However, of course, I do want the image to be shown. How can I achieve this? How can I tell Adobe Reader (and other PDF viewers) I really really realllyyyyy want to see that image there? I believe I'm not doing anything really exotic, right? There must have been tons of other people that wanted to do the same thing, I guess?
                    var annotation = new PDFLinkAnnotation
                                Action = new PDFUriAction(this.GetCodeUrl(code)),
                                Contents = AnnotationIdentifier,
                                Appearance = new PDFImageAppearance(bitmapImage),
                                DisplayRectangle =
                                    new DisplayRectangle(
                                    barcodeLocationInfo.X,
                                    barcodeLocationInfo.Y,
                                    barcodeLocationInfo.Tsw,
                                    barcodeLocationInfo.Tsh),
                                Flags = Flags
                    pdfPage.Annotations.Add(annotation);