is your router this one?
White Netgear DG834GT V1 Router
if so go look at this discussion on these forums, there is a firmware update for it. (others will probably point you to this discussion too)
http://bbs.adslguide.org.uk/showthreaded.php?Cat=&Board=sky&Number=3308977
My friend has same router and I sent her the firmware update as she was getting disconnected alot, slow speeds and wasnt happy with this router, she is now very happy as her router does things its never done before and router doesnt disconnect plus she now sees her speed all the time which she has never seen before.
firmware here (not sure if I am allowed to post this bit here, apologies if im not)
http://www.skyuser.co.uk/forum/sky-news-announcements/22073-get-your-sky-v1-firmware-here.html
Just a thought and I hope this helps you out