How do I use tiled with corona?

No i haven’t, ill try it. Thanks 

I’ve been trying ponytile; and I’ve managed to get the map that it comes with to show, but when I try to get a custom map to load, all i get is a black screen. What am I doing different?

Try follow @Rob Miracle suggestion

You should try to set your Tiled map to use internal tilesets 

how do i do that?

How do you do what? Make the tilesets internal? When you add a new tileset to your map, check the “Embed” button:

Yeah, thanks

You could also try using the exported .lua file option. With some for statements and some dot operator action it is really quite easy. I did it this way for a project I’ve been working on. You’ll just have to do all the coding for what gets placed and where, but it gives you complete control. For instance I use tile layers for the placement of the image tiles, action/triggers, level data, etc and a solids layer for where any color fills are needed. My level files have anywhere form 12-15 individual layers and this way loads very quickly. It only takes a second or two to load a level.