Member Log in pop-up

When i click member login at the right top, there is member login popup but it is at the left side of the page not  in the centre of the page . It looks like so bad.. Does anybody know how to set it to the centre of the page ?

compare your general.css with that of an new copy from 6.1.4

your missing:

.login_ajax_wrap {
width:350px;
margin:250px auto 0px;
}

.login_ajx_close {
position: absolute;
right: -1px;
top: 3px;
z-index: 150;
cursor: pointer;
}

templates/tmpl_xxx/css/general.c