Please note, our company name is Pololu, not “Polulu”.
The soldering in your pictures does not look good and there are many joints that are not making good enough contact with the pads, so we should address that first. I recommend using the Adafruit Guide to Excellent Soldering as a reference for improving that.
If you rework your solder connections and it is still not working, can you post updated pictures? Can you also tell me what VREF is set to along with what power supply and stepper motor you are using (a datasheet or link to where you got it would be ideal)?