trouble with 64 bit version blender mirror modifier

just started with blender software i’m trying a tutorial now, got stuck at the part with the mirror modifier. i do apply the mirror modifier on x- . now i try to move a face towards the middle of my object but, nothing seems to happen at all. any ideas?

ps : i use the cube mesh, using the modifier for modelling the character arms.

could we see a screen shot of your mirror modifier settings?
I understand that the mirror function does not seem to be working for you. However, without seeing the model or the mirror modifier settings, it’s pretty hard to know what the issue is.

solved, for some kind of reason its working now fine thanks anyway :slight_smile: