Hi. Has anyone ever applied the moving loads function to a panel and then tried to apply part of the moving load as a horizontal force?

I can get everything to work fine for just the vertical force though when I try to apply a horizontal "braking" component - I dont see the horizontal component on the graphical interface and there doesn't seem to be any effect on the results. I have been attempting to add the horizontal component by going to moving loads function then clicking parameters and then adding a coeffcient in the LR, LL boxes.