[KC Jones]

But i didnt save the mission in Net ,campaign or single folders :?

"when i click save as, writing name and blablabla.. save and nothing happens, when i check the saved missions folder ,theres no mission saved ."

Trust me.

You've got to save the mission into a folder; within either Single, Net, or Campaign.

Where do you think its being saved to ? ?

There is no folder called "saved missions" or "missions saved".

That's why nothing is happening.

Trust me.