"Giving WordPress Its Own Directory" and Login/Register/Lost Pass doesnt work

Hi I just created a Word Press website for my School..
https://stfranciscollege.edu.in (using WP 3.01)
I used the technique I read in this site as to how to give WordPress its own folder.

The site is working perfect, however the features Login/Register/Lost Password doesn’t seem to work (using side panel login plugin). Whenever it is tried, it gives a blank page.

Example:
(1) For register, it is trying to open this link : https://stfranciscollege.edu.in/wpsite/wp-login.php?action=register
Which gives a blank white page

(2) For Lost Password it is trying to open this link:
https://stfranciscollege.edu.in/wpsite/wp-login.php?action=lostpassword
Which gives a blank white page

In other words, https://stfranciscollege.edu.in/wpsite/wp-login.php is giving back a blank page and https://stfranciscollege.edu.in/wp-login.php
gives “Page not found”

How can I make this to work so the Register/Lost Pass etc work fine.

This is urgent and will appreciate the help you provide