how to password authentication browsering each directory separately

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Windows

Win2008-R2

IIS7.5

Hi,


i did the password authentication for each directory but issue is
for example i create the two website and i protected with password
but when i did the browsing mozilla firefox both site should share different password
authentication but it is sharing common password

means for example:
1)http://localhost/abc when i enter in the browse then ask the username and password
so enter the username and password then it will go to the website

2)second site http://localhost/xyz it not asking username and password it is directly
open site

i need that second site must be ask the username and password window
how to do?plz help me