Force on object in magnetic field

Hi,

I'm trying to calculate the force on a block of stainless steel, as a result of a magnetic field.
The plot of the magnetic flux density looks good.
But when i calculate the forces on the block through global evaluation, the values go all over the place.
For example, there should only be a force in the x direction. in my case the y and z forces are not zero.

I hope someone can help me with this.

Janeau