i was just about too say... if your router is from TALK TALK you will NOT have official Netgear firmware, however if your usernam and password was
admin
password
theres no reason it shouldnt work. also, if you edit the LOGIN files yourself SOMETIMES they dont work because they are formatted in special format (cant remember name of ASCII was it?) so they work, when you save them in windows notepad SOMETIMES they no longer work, sometimes they do... so if you edited LOGIN1 , LOGIN2 then theres a chance they wont work as the formatting is removed, I had this happen to me but second time I tried it they worked.. this is why the versions BA sent you work...cos they will have the proper formatting and reason your not getting bit loading is probably cos its Talk Talk firmware
you should install Netgear FW, I can supply links to the files - as its TT you may have to flash it from Windows XP with proper flah util, unsure though
anyway, your QLN graph looks alright too me, your line looks good...