[Paul]

Are you with Sky? That stats screen looks a bit off, you may be capped due to line issues etc. SNR/ noise margin should be as high as possible and at the very least in double figures for a stable connection if you are on the white netgear router. Your SNR is very high, your attenuation is good but speed low???
Have you had stability issues or connection drop outs in the past? If so you may have had your line cap to stabilise it.
Best bet is skyuser as there are a number of sky staff and adsl people over there but can you confirm that your router is on the master socket, that the filter is the first thing plugged into the socket and if there are any extensions or other devices on the line?