Max/MSP arduino communication

I tried to communicate between MAX/MSP and Arduino. I started with the simple step by blinking an LED as show in the following tutorial.
http://www.soundplusdesign.com/?p=1305
I am able to blink the LED after I uploaded Arduino 0018 firmware. The LED blinked just fine.
But as the tutorial said, after I close the arduino software and open MAX/MSP patch, I toggled "digital Pin output" as show in this tutorial. Northing seems to happen. My LED still blink as it supposed to be (every 1 sec) and the green buttons in the patch blink their own (every 0.1 sec, since the metro is set to 100).
What am I supposed to do to fix this? It is so frustrating, my project is due soon.
I tried to find more tutorials but most of them are quite outdated and I could not find any youtube videos either.
Thank you for your help….