Thanks for the help anyway, John. It appears my Trainz has gone and done what it did the last time I had an issue with it, and that was fix itself. The first time I launched Trainz after I made my last post in this thread, it worked like a charm. Even though Trainz is fixed, I'm still bothered because this particular situation makes it sound like I'm crying, "Wolf!" As I type this post, I am beginning to wonder if it was my TeamSpeak overlay that was giving me issues. The overlay has given me issues in the past with other games. I will do some testing later this week when I get time and then post back here about my findings.
Thanks again for the help and regards,
GN