Arduino-Max/MSP

Hello,

i just started to expereince my new arduino board -try and error methods...
i did already manage to read data in Max/Msp via the "serial" object from the arduino board, but it seems to be that im too stupid to send things to Arduino. there is something which is sent, but i dont know what..
for the beginning i just want to send the little easy letter "H" to the board to follow the examples of the arduino software.
could anyone give me a hint how to manage this? do i have to use Ints?
the "serial" object can handle the Bitsize/stopbits, do i have to change something?

woo