What does the link panel say to the resoltuion?
Did you scale it unevenly? Select the image with the Direct Selectsion Tool and look up in the scaling properties on the top.
In CS6 and later 100% previews the print actual size, not the 1:1 pixel to monitor ratio as in Photoshop. If you want to view the 1:1 ratio double-click the Zoom tool
THanks Willi for your suggestion.
Thanks. Your suggestion did it. So simple.