My 1S almost same trouble with yours, But I try with this link. And Its working on me, You can see step by step how to restore it. http://en.miui.com/thread-38687-1-1.html
I got same problems with you, n solved. My 1s still can boot into miui recovery.. and wipe data..wipe cache..finaly wipe data (lost data .never mind).. try to reboot ..n it work on me..