Error : "Cannot open database 'wizou.mdf' requested by login."

[Mr.KisS]

Hello.

I'm under Windows XP PRO SP1, IIS 5.1 ans SQL SERVER 2005
Express. When i try to open a connexion with :
<connectionStrings>
<add name="AppCnxStr"
connectionString="Server=KLEO\SQLEXPRESS;Integrated
Security=True;Database=C:\Program Files\Microsoft SQL
Server\MSSQL.1\MSSQL\Data\wizou.mdf"
providerName="System.Data.SqlClient" />
</connectionStrings>

I GET THIS ERROR :
____________________
Cannot open database 'C:\Program Files\Microsoft SQL
Server\MSSQL.1\MSSQL\Data\wizou.mdf' requested by login.
Login fails. Login failed for user 'KLEO\ASPNET'.
Description: An unhandled exception occurred during the
execution of the current web request. Please review the
stack trace for more information about the error and where
it originated in the code.

Exception Details: System.Data.SqlClient.SqlException:
Cannot open database 'C:\Program Files\Microsoft SQL
Server\MSSQL.1\MSSQL\Data\wizou.mdf' requested by login.
Login fails. Login failed for user 'KLEO\ASPNET'.
____________________
The file wizou.mdf exists. What have I to do? (sql server
2005!!) If i must changes something, plz tell me step by
step (i'm novice witg sql/asp.net 2).

Plz answer if u know

Regards.

(msn: (e-mail address removed))