Java error no lwjgl64 in path?

LWJGL uses its own variables for the path to the native libraries:

System.setProperty("org.lwjgl.librarypath", new File("pathToNatives").getAbsolutePath());

If you kept the file structure from the LWJGL package you can use something like this:

switch(LWJGLUtil.getPlatform())
{
    case LWJGLUtil.PLATFORM_WINDOWS:
    {
        JGLLib = new File("./native/windows/");
    }
    break;

    case LWJGLUtil.PLATFORM_LINUX:
    {
        JGLLib = new File("./native/linux/");
    }
    break;

    case LWJGLUtil.PLATFORM_MACOSX:
    {
        JGLLib = new File("./native/macosx/");
    }
    break;
}

System.setProperty("org.lwjgl.librarypath", JGLLib.getAbsolutePath());