Default Palm Trees not appearing

[XxInsaneAsylumxX]

So I'm working on a map, and I used the default palm trees in My Trees. They don't appear when I enter the map through the Cape, but they appear just fine in Map Maker. How can I fix this?
[update] There's a lot of stuff not appearing in the map outside of Map Maker, not just default items

[ArcticGalaxy]

Be sure that you are saving and exporting your map.

[XxInsaneAsylumxX]

I have been, but the palm trees just refuse to appear.

[ArcticGalaxy]

Try changing your rendering system? I've had that problem a couple of times and changing the rendering system helped.

[XxInsaneAsylumxX]

That doesn't seem to help, either.

[Kynvuu]

In the objects maker, input the information for the palm tree mesh and then export it to a new group. Sometimes you have to save the meshes to another group besides the default MyTrees