What grit of sandpaper did you use? If you used too fine of a grit you may have polished the wood, so that it's unable to take a stain--your description fits the symptom of well-polished wood. You can go backwards and that should open the grain back up, but you've removed finish and stain at this point.
As mentioned above, the ding should have been steamed out before sanding. I believe the Browning uses a polyurethane finish, I'm pretty sure it's not an oil-based finish. By using the sandpaper, you've cut through the finish and probably removed stain as well. If it were me, I would remove the finish on the entire stock and start over. You can remove that with KleanStrip KS-3 stripper--you can get this at Home Depot or something similar at Lowe's. It works well on polyurethane finishes, at least with the furniture I've stripped. Use the non-water-based version, you need to rinse w/ mineral spirits not water. You can then start over with your own stain preference and finish. Yes, this is a project you can do yourself, just take your time.