LODs not importing? (SOLVED?)

Hi, I've been trying to make LODs for a buttom mesh but when I import the LODs I created it won't load into sims 4 studio. I've created pants before but it was fine when importing the LODs. Now with a new one, the LODs won't import.. I've seen other's thread saying it's about the cut thingy..? I kind of read a bit about cuts but I don't understand well :( ps. the reference mesh I used only has one cut and my pants are made to be above the ankle so it only has one cut too.. Do I have to make cuts still? I'm confused D: please help..

EDIT*
I tried using blender 2.70 instead of 2.78 and for some reason it was imported fine now.. idk what happened haha I have s4s tools in both blenders tho o.o haha

Here's my files:
package
lod0
lod1
(I stopped at LOD1 after I tried to import it in S4s and it was not importing)

These are the tutorial I've tried: 
sims4studio.com/thread/13372/creating-lods-1-2-clothing
sims4studio.com/thread/9464/tutorial-correctly-make-lods