If you import a picture using the PhotoView Power Tool, this picture will be always a vertical static board, so it is not possible to import a picture and lay it on the table.
The correct procedure to set a puzzle on the table is the following:
1 - Import the picture as Material (File => Import => Material to Library).
2 - Place the table in your plan (pointed with a green arrow in the image below).
3 - Place a surface on the table with the size of the puzzle => you can create a surface using the 3D workshop Power Tool or use one of the elements in the libraries.
4 - Apply the imported material on the surface (pointed with a red arrow in the image below).