led matrix with mux shield

hi,

on the arduino, you can do this:

digitalWrite(row[2], HIGH);
digitalWrite(col[2], LOW);
digitalWrite(col[2], HIGH);
digitalWrite(row[2], LOW);

but when you put the mux shield on, it doesnt work anymore, because you controll all the pins with just one pin, pin 14.
ofcourse, there are three muxes, controlled by three pins, pin 14, 15 and 16.
but then again, you will also need an additional 4 pins to controll the pin on a single mux.

Is it possible to controll two muxes at the same time?

Lennart