Please provide some information about the hard- and software used.

DM500S
Enigma
Any

I have a weird problem with a box that was working fine. I flashed with a new image and since then I can connect to the box via ftp however after changing directory a couple of times I get disconnected. I am then unable to connect for a short while and then I can connect and the same problem occurs again.

I have tried reflashing the previous working image to the box but still no success the fault is happening there too.

I am at a loss as it was working fine before and was hoping for some suggestions before putting it down to a hardware fault.