I have the GP40 loco pack for CSX Heavy Haul, I have complete all the Scenarios and 22 of the 24 services. Service Q355 and Q640 stall at 1.2% grades. Either both engines are actually pulling or a third is need. You can tell from the start of scenario, there is not enough power. I opend a ticket, respond..post it on the forum, we don't see anything. Anyone else have or sovle this issue? Thanks!!