Are you sure you satisfied all the requirements for this scenario?
required payware:
-RSC Dash 9 DLC from Steam
-RSC SD70 Volume 1 DLC from Steam
-RSC SD70 Volume 2 DLC from Steam
-RSC US Freightcarpack (included in the RSC SD40-2 Widenose DLC)
required freeware:
-Union Pacific/Southern Pacific repaints for the Dash 9 by Michael (bobbel66) Zimmer (Railworksamerica File Library:http://railworksamerica.com/cgi-bin/dl-cnt/download.pl?file=136)
-Repaints for the USFC Centerbeams from Digirails (
http://s1.zetaboards.com/DigiRails_Forums/index/)
-G-TraX Doublestack Containercars (
http://gtraxsims.com/)
If so, did you test each install of the above to make sure they worked before attempting the scenario? If not, maybe you want to give it another try. Don't give up. Half the fun is figuring out how things work. This stuff is rarely "plug and play".