Print bed won't move

I have built my first reprap i2, but have run into a problem. My print bed won't move. Y and Z do not have the same problem and with I connect the prnt bed axis to the stepstick used for y it still does not move.

I should say that by won't move I am talking about large amounts. When I click Home the printer just vibrates. I have used two different beds and replaced the smooth rods.. Not sure where else to look... Any suggestions would be helpful.

I am also useing aluminum pulley's.

Either your motor wiring is wrong or you need to increase current to the motor using the pot on the driver.

I swapped motors with the motor for my Y axis and tried again... It moves better, but it is doing a lot of vibrating... The StepStick I have only has a 7k pot. Do I need to upgrade my driver?

The print bed IS the Y axis.