for some odd reason, I can't Loginto the admin panel

it says it's because "my IP Adresses has changed" and it tells me I can fix it inn the security setting, which you can only acces IN the panel, so I'm f*cked, I can't do much now, I can edit pages etc. but I can't close the site to do so, so no major updates fore a while, untill this problem gets fixed.