make friction 0? sometimes if it grips too much, a forced move will be shot through another object.
not sure if you've already done that, just a random suggestion

also, i believe to make it more realistic, have gravity pull it down like normal, but angle the table, unless your g-force angle is the same, then it doesnt matter.

For a reliable simulation,

- Gravity should be normal
- Table should be angled as  a normal pinball. All stops, flippers, Etc. must be as in the real world.

As I understand, your ball passed thru, meaning it falls to the ground as if the table is not there. If so, there are other possibilities, assuming you connected all components (table-ball, flippers-ball, etc):

- Check the table collision mesh. It should be a closed body, and its triangles well connected. The most probable cause is a faulty mesh.  Remake it, with separate pieces for the table floor and all other items, like posts, walls, flippers, and so on. Triangles should be as the document says. Not to big, not to small.
-  Check the initial ball position. If it is just below "ground" it passes through and falls.  Too high a speed could be a problem too for other physics than ODE.
- Sync position between visual and collision body for all table components.