How do I change my mesh selection in a marketplace edit listing in my store?

[Sadie Selenium]

When I edit my Mesh category in the "edit listing" window, I can't select partial or 100% mesh on the items, even though I know they are for mesh avatars and are 100% fitted mesh. Why is the program not permitting this? 

Thanks for your help. 

 

[ChinRey]

You need to do the mesh upload test before you are allowed to lsit anything as mesh on MP.