You do have to hold it down all the way, like a bow in critical. If you F3 and the area says ocean, then there's a problem with the biome changer (spatial pylons don't do that automatically). Otherwise if you're holding it down all the way and it's just not working in the forest biome, then The problem is in the research notes.Yeah, unfortunately I've tried doing that throughout the forest. No such luck, just keeps saying researching the Ocean