Did you export the map?
Simple steps:
1. Go to Tools, and then Map Maker.

2. When you click on it, some weird things will appear.
3. By now focus and only in the "Map" Tab. Yo will see "Map Name:" and "Map Display Name:", right?

4. In the "Map Name:" you will put somethin' at you choice (I think, not a pro). In "Map Display Name:" you will put the .fhm file the pack you download.
For example, let's say that the .fhm file is forestvalley.fhm, and I want to put Forest Valley:
Just put the things below, and ta-da!

Remember that spaces in the "Map Name" "glitches" the exporter out, so don't try it.
Then click in Export, and go to Cape of Distant Worlds! Your portal should be there.
Hope I helped you.

Any questions just ask.