Hi folks, I've got a Sagem router which is located upstairs in the house however the signal is quite weak at the furthest away corners of the house, I recently tried a Linksys repeater which is identical to my brothers who also uses Sky broadband however when I plugged the repeater in my laptop was unable to find the signal (my brother plugged his in and it found it straight away)

I've got a fairly new laptop on Windows Vista Home Premium, my brother runs XP - is there some way to enable my laptop and Vista to pick up the signal?

Thanks in advance