Hi jorge,

Ok well first let me say that the video wasn't done to show anyone how to wire drives etc, it was done just to show that slaving works and it's shortfalls. Also if you have understood my Yorkshire accent then very well done because people only 30km away usually struggle. . . Lol

Why you are having problems could be one of several reasons.
First check motor outputs are wired correctly. See below.
CH0 Dir (+) = 1 Dir (-) = 14 Step (+) = 2 Step (-) = 15
CH1 Dir (+) = 3 Dir (-) = 16 step (+) = 4 step (-) = 17
CH2 Dir (+) = 5 Dir (-) = 18 step (+) = 6 step (-) = 19
CH3 Dir (+) = 7 Dir (-) = 20 step (+) = 8 step (-) = 21

Next could be Motor phase wiring is wrong so check the motor wires are correct. The sequence and frequency of flashing LED lights should tell you fault code. Check the manual for fault codes.

Next check the Current settings on the drives just in case you have them set to very low current setting and the motors are stalling, the fault codes should tell you this.

If this doesn't work then take pictures of the wiring or make video and post here.