Problem with backup dump rotation

[NiKo2b]

Hello,

I'm searching for weeks to solve a problem with Plesk backups.
I set it to just keep 4 files on my backup server, but since a few months, it does not work anymore. When the FTP server is full (6 files), new backup files are stored locally. I can delete files using Plesk interface, locally and on the FTP, but the rotation doesn't. I dont't know why.

I tried to update Plesk (9.5.2 to 9.5.4) but it didn't solve it.

Can someone help me?
Thank you

PS : Sorry for my english

 

[NiKo2b]

I found this :

Panel failed to rotate backups on external FTP repository if FTP user was not chrooted.

here

But I don't know what it means

 

[NiKo2b]

I found this :

Panel failed to rotate backups on external FTP repository if FTP user was not chrooted.

here

But I don't know what it means