I had the same problem few days ago.
It was because i was confusin static and dynamic linking with my libraries.
Check that you're on the right mode in VS.
The best way to handle it is to add your project to the SFML solution of the SDK, and then to remove any library you're linking. Then, just tick the libraries you need on your project dependencies window.
After that, choosing the mode (debug/release static/dll) will configure all the solution (sfml+your project) for dynamic/static linking in debug/release, depending on what you'll have chosen.