Hi there,

I have a kit of 4226 EU MODEL. It has two devices 4220  V2 and 4020 V1 . In the same network  I have added two more 4220 V4 adaptors. Everything worked almost flawlessly till recently. So i thought i have a try with firmares. 

I have upgraded the firmware in every device because i wanted to have a little better performance and more stable network.

While in 4220 devices the firmwares looks ok with the latest  one installed , on the contrary the 4020 seems to have a downgraded firmware even though I have downloaded the latest one ....

The first firmware I had was 1.3.0.2134-00_402191_160311_903 and was at 600 Mbps. Now it shows up 500 Mbps !!!  and 1.1.0844-01_402011_140208_001  firmware. Also a humming noise ( not loud but it really bothers me ) goes out of the speakers when joining the network ethernet cable on the pc or the router. 

 Now my network is messed up with continues disconnections and humming noise also.

So I really need my first firmware 1.3.0.2134-00_402191_160311_903 installed again but i don't know where  can I find it.

Any help on this would be great.