Working on a CityMania Citybuilder, and my town demands coal. So i've transported tonnes of coal (both from the local mines and from out of town mines) and nothing is happening. What am I doing wrong?

For coal to be counted it has to be

1. Accepted by industry. Just piling it up on station won't work, so deliver it to power plant (and if you don't have one in your town you'll have to fund it)
2. Coal unloading station has to be relatively close to your town center. For classic CB servers it's 25 tiles manhattan distance from station sign to center. On new CB servers any part of station counts, not just sign, and power plants there are placed is such way that pretty much any station will be fine.