Open file with Calendar

Hello,

Configuration: Mac Mini - Mavericks - running a FileMaker server 13 on a local network.

Purpose: Automated archive a single file (.zip).

For this I create an App with Automator (archive a file and copy it in a folder).

This app is stand alone. When I clic 2 times on it it works well.

I try to run this App automatically everyday with Calendar.

For this I use (in the Alert dialog) open file and I select my Automator app.

On the server, when I close Calendar, and reopen it, my configuration alert (Open file) disappeared.

I try under Yosemite and it works fine.

I can update this server to Yosemite because there are still some incompatibilities with FMS.

Any idea to run automatically my automator app?

Regards

Ben