Carson Car Shops

I downloaded the Porter 0-4-0, it's great. I placed it on a layout of a hardrock mining operation. Unfortunately, for some reason, it will not pull six NG orecars (not even on the level). Is it possible to modify the config file to give the Porter more (for lack of the proper term) "pulling power"? Any suggestions are appreciated.
Thanks
Joe

TS2009 and newer reduced the power by about 4x of older enginespecs. I hope to update the porter to 2009 sometime this year, but time will tell...
If it's any consolation, the prototype only hauled loaded cars downhill

Thanks for the response. I had posted the same question on the Trainz forum just before discovering you had answered. I guess I'll have use a different locomotive.
Thanks again,
Joe