Lets try this......and I clicked this link it does work and it does show his name on MSG header......
https://forums.auran.com/trainz/sho...etan7-Content-Releases&highlight=shebashetan7
Once your on his MSG thread. Look at his name.......Click on his name.....You see several choices POPUP,
one of them will be "PRIVATE MSG" then double click the item, it should bring you up a private msg window, from you to him............