Cant s or r from/to MAX!

Okay thi should be simple and I have read and searched forums the globe over but after 3 night of no joy I am resorting to the ultimate authority!

So I want to connect to Arduino from MAX.

Got the Arduino2Max
Changed serial to usbserial-1000101D


little red light flickers on and off when i hit ok and responds when i change sample rate.

Should be sweet right? Right ?

Nope - can receive from a push button switch - digital in or send to an led in pin 13.

Help me get some sleep tonight and tell me what Im doing wrong.

Thanks - sleepy in NZ