ok, i must be doing something pretty stupid here... but its annoying me so i need to ask for help, hopefully i'll get somewhere then

anyway, i have an xbox 360, obviously, however i havent always had it connected to the internet. infact for most of its life it wasnt, i have only fairly recently run a wired network through the house to my room..

anyway when i did have it wired in, i wanted to be able to use LIVE, so i chose the option to 'revcover gamertag' and went through putting in my email address and password etc..

problem is, this created another profile. it has the same name (my gamertag name) but this shows with no achievements or points or anything..

what have i done to recover this incorrectly?

thanks in advance for any advice, this is annoying the hell out of me