I cant open the memories section at the moment, and i'm getting frustrated, so i apologise if this has already been asked (which i highly suspect it has) but please dont hate me!

I've just created my first icon (yay! whoop-de-woop for me!) and i'm trying to load it onto my live journal so i can use it, but no matter how small i make the icon, the LJ keeps saying that the file is over 40k. What is the general size for icons? I'm using photoshop7 to create the icon and i'm browsing with firefox.