Mikrotik RB750 can't Upgrade :(

Hi Guys

I’ve upgraded many many routers but I am having a strange problem with this one.

As soon as I start to copy the upgrade file I get “router disconnected”. I have tried to do the upgrade after rebooting the router but with no avail.

Anybody had a similar problem? Is the router perhaps faulty?

Note : This router is remote.
Mikrotikunabletpupgrade.jpg

try to upload files throw FTP.

Thanks I’ll try that