play wav with lightsensor in MAX(inc patchpicture)

hi everybody!
I am stuck in making Max play a sound when light sensor which is connected to the arduino board stop reciving light. I get the sensor to play a tone but not a wav-file.
I’m using simple message system code in arduino and Max file which look like this picture.
Wondering if someone have more experience with this my quiestion would be how to get it work?

Thanks for any help. ;D

se max patch picture here:

http://www.thisyellow.se/bildmax.jpg

/martin-krakov