Hi everyone, I've homebuilt a laser engraver bed,

Hi everyone,
I’ve homebuilt a laser engraver bed, and I’m able to control it using LaserWeb

If I test laser, the laser fires, but when I send GCode to run, the laser never fires. I have S Max and $30 and Test S set to 1000 (also tried pwm on 1)

What do you suppose my problem is?