"Silent Hunter Wolves of the Pacific Gold Edition" is v1.5, not 1.4. When your game loads, do you see the "v1.4" or "v1.5" in the lower right? When you get to the main menu, do you have a choice for a German career? Or, if on the Quick Mission menu screen, do you have a "Switch Sides" screen? Do you have any mods activated? Have you deleted the Save folder (usually "C:\Users \UserName \My Document \SH4")? That folder holds the information that the game uses to run.