Problems by Import "Add APEX Clothing File"

Hello,
i have different 3dsMAx Software. And if i try to import the *.apx File to “Add APEX Clothing File” then i get at every time the Message: Failed to import APEX Clothing asset from the selected file.
Can you tell me please wich version of 3dsMax did work with this APEX-Files? Or could be something else the problem. I’l try to make a Cloth. I hope you know an answer.
Many Thanks in Advance,
Andreas