Import of Catia V5 files errors

Hi everyone, 
I have some trouble to import Catia V5 files into 3DX, 
I have this error message : "you cannot import the files, you don't have the rights, please contact your administrator". 
The issue is that I have 3DX with a challenge sponsorised by 3DX so the administrator in charge of our 3DX is myself... i anyone can help, it would be great 
thanks ! 

​​​​​​​​​​​​​​Edu ​​​​​​​3DEXPERIENCE ​​​​​​​CATIA V5 ​​​​​​​