Mick In the absence of the master's on here (I am sure they will be around in a bit) let's see if you can get your original kit working. Frist alter the vel in Mach to say 1500mm/min and try that. (you have it set for about 2000mm/min).
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The other kit you have bought is better but not good. You need motors with low inductance. The drives in that kit will accept up to about 48V which is better and you could use them with the power supply from the kit.

Don't get despondent there are plenty of people on here to help. ..Clive