That's your problem; in February of 2009, a patch changed the map format and new maps won't work on older versions of the game.  You'll need to patch to install these maps.

As well, the map directory changed in that version as well:

c:\Users\<Username>\AppData\local\Ironclad Games\Sins of a Solar Empire\GalaxyForge

Once you patch, this is where you put downloaded maps.

To patch the game to the most recent version, download "Impulse" and register your serial key.

Sucks to be me then...

Now I get to go buy it.

I have Trinity v1.011 but cant get my maps to show,but when i switch it over to Sins v1.191 it shows up .can any on explain that.

i have tried saving the file in both galaxy forge and galaxy folders but it only shows up on the original Sins game.

That didn't answer my question, what directory are you putting it in, as in the full path.

Ah, so you were trying to put it into the "program files" directory.  This isn't where you're supposed to put it, but if you edit the manifest file it will work.  As I mentioned, the correct directory is:

c:\users\<username>\AppData\Local\IronClad Games\Sins of a Solar Empire\GalaxyForge

It's a bit of an annoying place to find, but you can dump the map files there and they'll work without having to change the manifest file.