Ruckus ICX7250-24P firmware upgrate issue

I have successfully update the firmware of my Ruckus ICX7250-24 switch to the latest version. But now i have another problem.I have also another Ruckus switch (ICX7250-24P) which I used this one as a stack with the previous Ruckus switch (ICX7250-24).The problem is that I am trying to upgrade the second switch but with no success. I have the following message “TFTP to Flash Error – code 5”.I have read that this is a time out issue but I don’t believe it`s a problem from TFTP Server.I have to mention the below. When i took my switch out of the box, I had two images (SPS08030h.bin primary and SPR08030.h secondary) but now I have two same images (SPR08030h.bin).