larger stepper motor needed

[Desertboy]

hi chaps. I purchased a router off ebay and the stepper motor I have will not move the x axis. the motor is a 2.4nm 4 wire job at 3 amps. the router is using normal lead screws not ball screws. the axis can be moved by hand, but I think its just too heavy for the motor for the motor to deal with.
so my question is what can I do to improve this.
the motor is a 23HS2430B 1.8 3amp and I am using a HG08 breakout board from cnc4u,
what would be the largest motor I can het away with on 4 wire, and would I need to give it its own power supply.
thanks michael

Do you have a link to the ebay listing for what you bought?

[terry1956]

the drivers are *CW-5045 from cnc4u