Why my humanoid models wont import right?

I got the following problem, i make animations through Motionbuilder and when i export them through 3ds max into fbx and then import them into Unity(rig them as humanoids) they are faulty, mainly the hands a bit the legs, their positions are a little off, i try for example to cross them( i actually put them in the exact same X direction) but they appear to go farther more to that direction and pass through each other.I checked my bones and they appear correct....cant see what is wrong, i searched through the internet but coulden't find anything so i posted here.Animations seem right in both Motionbuilder and 3ds max(btw i used Uma male rig) even when i directly do the animation in 3ds max it still appears somewhat wrong...so i guess the import setting of unity are at fault or something like that.Help plz