Endpoint Manager Firmware Issue

I just purchased EPM for my HA environment.

I am trying to download firmware onto my Yealink T23G.
I get to the point where the firmware file is stored in the /tftpboot/yealink/1 directory.
Under Firmware management I go submit query and it says that my firmware was successfully installed, but nothing happens on my phone. I have tftp selected as the provision server protocol. Provision Server Address and Destination Address is my floating HA IP.

What am I missing? Any Config on the Yealink itself?

Anybody can help me out?