XCGLogger not printing logs out of main classes

Question

I'm writing a little game with SpriteKit using XCGLogger to write logs. The problem is that i can only see logs messages from the GameScene class in the log file, even when I use XCGLogger in other classes like maps, characters, etc.

I defined in appDelegate.swift file the path, log_level and write to tests messages. I used it in GameScene class and in other classes without any header redefinition or other setup. I only copied swift file and header file of XCGLogger library.

I used XCGLogger Version: 1.7 - LogLevel: Debug.

What i'm doing wrong ? It seems that i don't need to use a singleton to share same instance between classes cause log variable created in appDelegate class is a global variable.

Update : Instantiate code : AppDelegate.swift

let log = XCGLogger.defaultInstance()

// Configuración del sistema de Log XCGLogger
            //--------------------------------------------------
            let logPath : NSString = "/Users/memmaker6501/Desktop/CocoaGAME/OctoPussy/log/OctoPus_Log.txt".stringByExpandingTildeInPath
            log.setup(logLevel: .Debug, showLogLevel: true, showFileNames: true, showLineNumbers: true, writeToFile: logPath)

            log.verbose("A verbose message, usually useful when working on a specific problem")
            log.debug("A debug message")
            log.info("An info message, probably useful to power users looking in console.app")
            log.error("An error occurred, but it's recoverable, just info about what happened")
            log.severe("A severe error occurred, we are likely about to crash now")

GameScene.swift

Directly using the logging library --> log.debug("Entrada mouseDown")

Using the library in other classes, for example in Map.swift.

log.debug("Entrada generateTileGrid")

Thanks in advance.