MRL 50ft

I have just downloaded the MRL 50ft box car. Ran the installer, checked the box in the fly out - it showed up in the list but when I tried to put it on the tracks - no show - no couplers - nothing at all. Am I doing something wrong??
https://railworksamerica.com/forum/
https://railworksamerica.com/forum/viewtopic.php?f=29&t=16541
NStrains wrote:Do you have the 50' plate b car that it is based off of? Doesn't sound like you do.
buzz456 wrote:Why would anything be doing that? You need to learn about file structure and go look in the file and see what's there. This is not rocket science. Go look in MainLines\RailVehicles\Freight\Boxcars and see if the MRL one is listed there. Then look in there to see if the FMC50B.GeoPcDx is in there. If it is you need to make sure the Mainlines folder is checked and that you are looking in the right place for the car. It's with the other FMC cars.