Jeroen,

No, i'm not. I am doing it the old fashion way. I have a bread board with a million wires sticking out of it. I can write to the port now.

try nothing fancy. also someone above, I can't remember who, said, since there are interupts located on P3 it better to use P1 for testing.

void main()
{
P1 = 0x55;
while(1);
}

try this,

Eric