Matt. I think what might be happening is the library you have is for x64 but you might be linking in the x32 configuration for VS2013.
Go to Build => Configuration Manager. What is the Active Solution Platform? Win32 or something other than x64? If it’s not x64, try creating a new configuration where the Platform setting is set to x64. Make sure you select to copy the settings from your current configuration so you don’t have to set directory locations and dependencies again.
I am using VS2013 Community Edition and had such a problem.