I currently am using Acrobat 7.0 Professional and Illustrator CS2, the pdf has 3 layers and I'm trying to open the file in Illustrator and retain the layers, but when I open the file it converts to one layer. Do you know how to retain the layers when importing into Illustrator CS2?
Unless the PDF was saved with Illustrator Editing Capabilities turned on, it is not possible for you to recover the layers. In Acrobat the layers are called something else (Optional Content Groups-although they correspond to AI layers) and are not readable in AI. You will probably have reconstruct the layers.
I was wondering about this. Is there any way to select Optional Content Groups in Acrobat? I've never thought of trying it.