Hy.
I'm try to export in fbx a skinned mesh max project , but i get these errors:

One or more objects in the scene has local axes that are not perpendicular to each other (non-orthogonal). The FBX plug-in only supports orthogonal (or perpendicular) axes and will not correctly import or export any transformations that involve non-perpendicular local axes. This can create an inaccurate appearance with the affected objects:
-AlienPelvis
-AlienSpine1
-AlienSpine2
-AlienRibcage
-AlienLArmCollarbone
-AlienLArm1
-AlienLArmPalm
-AlienLArmDigit11
-AlienLArmDigit01
-AlienLArmDigit03
-AlienLArmDigit21
-AlienSpine3
-AlienRArm1
-AlienRArmPalm
-AlienRArmDigit01
-AlienRArmDigit02
-AlienRArmDigit12
-AlienRArmDigit13
-AlienRArmDigit21
-AlienRArmDigit22
-AlienLLeg1
-AlienLLeg2
-AlienLLegDigit01
-AlienRLeg1
-AlienRLeg2
-AlienRLegPalm

what' mean?
and how i can correct it?