I am using beam/column calculator in the frame generator in inventor 2010 suite.

I have a beam being used for a flight of stairs it is positioned 40 deg above the 'floor' or my xy plane in my assembly.
I want to place a distributed load acting as if there were several people stading on the stairs at one time so in the direction of the z axis of my assembly.
The problem I am having is I try to change the angle of the distributed load but it only allows me to change the x and y components of the load. You can see this in the screenshots i took.

Is there a way I can:
a) change the angle of the laod in the Z directions
or
b) change the cordinates in beam itself so the x axis is along the length of the beam instead of the z axis.

Any help would be greatly appreciated.

Matt