need help saving map

need help saving map

Hey im trying to make a new version of risk, but every time i save it, it saves with a W3X on the end instead of a W3M. Now when I go to edit my map in the world editor, it wont opne the map, and it deletes the file. Why is my map saving with W3X on the end, and how can I open it on world editor if it already has?

ok i uploaded the map onto the site, so if some1 could download it, and try to load it on world editor, and if they succeed could u plz tell me!

W3M - type of maps wich maye use WC3: ROC and TFT
W3X - type of maps MAY BE USED ONLY BY WC3:TFT

oh i see.... im an idiot! but how did my map turn into a w3x map?

The reasons are:

1. Custom objects
2. Custom triggers
3. Expansion-only units used

are there any specific objects, or triggers that will (excuse the pun) trigger this?