-mod mods\fsport,fsport_mediavps, mediavps_3612
Here's the issue. You didn't follow the install procedures. Now, it may offend your sense of neatness to not put mods in a separate "mods" folder, but doing that will break stuff (as evidenced here). The issue is that the various mod.inis have all been written with the assumption in mind that the mod would live in its own folder in the base FS2 directory. In the FSPort's case, it expects the FSPort to be in FS2\fsport, the fsport mediavps to be in FS2\fsport_mediavps, and the 3.6.12 mediavps to be in FS2\mediavps_3612. In addition, the fsport_mediavps need to be loaded _before_ the fsport, otherwise they're not going to work.
To fix this, move the fsport and fsport_mediavps folders to the base FS2 dir, and select the fsport_mediavps as the active mod in the Launcher. Assuming you haven't edited the mod.ini there, it should work.
Also, stuff like this should never, EVER be put on Mantis. The SCP Mantis is for code bugs only, not for setup issues like this.