FTP issue - Files renamed

This just happened recently, it’s not always been like this.

The problem is when I transfer files to my site with Fetch. When they’re done uploading, they get names like “ftpBi5j7S” and no file type. What’s up with that? It makes it impossible for me to upload loads of images at one time cause I lose track of what is whom and which is where. But if I upload only one image and rename it again to “example.jpg” it works… so the files doesn’t get destroyed or anything.

:h:

[COLOR=Red]EDIT: [COLOR=Black]Excuse me, I forgot to say hello:)[/COLOR][/COLOR]