Problem With Window Authentication in ASP.net 2.0

[todashah]

Dear Programmer,
I have a developed simple asp.net application to learn how window
authentication is work ? To perform window authentication i have
make following changes.

1) First i create virtual directory name (myvd) for my application.
2) Next i open iis & from that i have select my virtual directory
& from action menu i have selected properties then i have select
Directory Security Tab & click on Edit button & then Uncheck
anonymous access & check integrated window authentication.
3) In web.config file i have set authentication mode is Windows.

I have followed all the steps written on msdn site.

Until it is fine but when i run my application then it is ask user id
& password for authentication but if i give the user id & password
of window operation system then it can't work & not allowed me to
open web page so i have no idea about what is the problem ? If u
have any idea then guide me.

Bellow i give example which password & user id i provided for authentication.
suppose
Computer Name:DAS
user id in os: ABC
Password in os: abcdefg

Provided Use Id:DAS\ABC
Password:abcdefg

Give Reply,

[kenobewan]

Are you using the wwwroot folder? What permissions do you have on the folder you are using? Usually an aspnet/ network service account is needed...

[todashah]

i have give
http://localhost/myvd/Default.aspx in internet explorer to
run this web page. Now to preformed authentication it is asked
for user id & password if i give user id & password of window os
then its give error & not allowed me to access page. I have given
read,write & execute permission for this application when i create
virtual directory...