Issue deleting Customfield File content

Unable to delete a file from a curstomfield File:

Unable to render embedded object: File (Unable to render embedded object: File (attachement-name.jpg) not found.) not found.

I have created a customfield with the type File for the Membership

I can"t upload a file, replace it but I can't just delete the file.

Link to the file itself is:
http://www.***.fr/civicrm/file?reset=1&id=1108&eid=12606

Link to the delete file is:
http://www.***.fr/civicrm/contact/view/membership?reset=1&id=12606&cid=166&action=update&context=membership#

That kind of delete link works to reset all other kind of custumfield but not if it's a file type.

I was before in CiviCRM 4.2.9, and the link to delete a file was:
http://www.***.fr/civicrm/file?reset=1&id=188&eid=12606&fid=16&action=delete