Auto Upgrade - V7- Failure

Hi,

Auto upgrade does not work. The client does not retrieve the file.
I copied the file under Files, but nothing happened.
Ping between the two devices is also possible.
What else can be wrong?

Server:
/ip address add address=10.99.155.1/24 disabled=no interface=VLAN_99 network=10.99.155.0
/system upgrade mirror set enabled=yes primary-server=10.99.150.1 user=test

Client:
/ip address add address=10.99.155.3/24 disabled=no interface=VLAN_99 network=10.99.155.0
/system upgrade upgrade-package-source add address=10.90.155.1