So it oscillates, but not a lot? I assume you’ve checked the component values, but you may want to check the main oscillator cap again, just to be on the safe side (the capacitor connected to pin 11, should be a good 1 nF capacitor between the pin and ground).
Another possible option is that you simply don’t have enough CV in to the CV mixer (pin 15). With the usual component values, you need around 9 V in total (from all CV sources combined) to hit 440 Hz (see the chart below, from here).
You cannot measure this on the pin itself, but if you measure the voltages on the other side of each 100k resistor and sum them up, you should get the total CV.
