Minecraft on xbox won't mine flint or other objects?

My minecraft on Xbox 360 doesn't mine anything. For example I will hit blocks with iron in them and I won't get any iron. It is really annoying, does the Xbox version not come with these features it is really confusing.

Are you playing on creative, 'cos you can't mine there. Also, you have to use proper pickaxe to mine, like wooden for stone, stone for iron, and iron for diamond (of course, you have already known that, right?)