I am creating a route and want to know how to determine which rolling stock will load and unload commodities. I am using Trainz 2010 EE and have gone through manual on setting up a simple driver session. It describes setting up a coal mine and a power plant. The example given works fine on loading the coal cars at the mine and unloading them at the power plant. I have taken another step and have placed a forestry and a lumber mill on my route. I have found a flatcar that will load the logs at the forestry, but when I take them to the lumber mill they won't unload there. I just don't know what I could be doing wrong. I haven't been able to locate any tutuorials on setting up this type of thing. 
 Any help would be appreciated.... 
Mel
				
			Mel