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and update & restart)
Then I config
passthrough source module :

(place in page HOME in child portal and only host/admin can view it)

Target URL: Page on target site to redirect to. This page should contain an instance of the PassThroughTarget module.
Encryption Key: The key to use to decrypt the user data passed from the PassThroughSource module.  This key must match the key used in the PassThroughSource module.	[script removed]

the target URL is page Home of child portal where I place passthrough target module

passthrough target module:

(placed in page HOME in child portal and only host/admin can view it)

Redirect To (existing user): Page to redirect to after a session has been established, if the user already existed in the portal.	Link Type: None URL ( A Link To An External Resource ) Page ( A Page On Your Site ) Location: ( Enter The Address Of The Link ) Select An Existing URL
Redirect To (new user): Page to redirect to after a session has been established, if a new user record was created.	Link Type: None URL ( A Link To An External Resource ) Page ( A Page On Your Site ) Location: ( Enter The Address Of The Link ) Select An Existing URL
Source Database Connection: Connection string for the "Source" DotNetNuke installation. This value is required so that the PassThroughTarget module can read user data from the source DNN instance.
Source Database Owner: Database object owner. Get this value from the source database "data" section in web.config.
Source Database Object Qualifier: Database object qualifier. Get this value from the source database "data" section in web.config.
Encryption Key: The key to use to decrypt the user data passed from the PassThroughSource module.  This key must match the key used in the PassThroughSource module.	[script removed]
Synchronize Security Roles: Automatically add the user to the same security roles they are part of in the source portal.
Security Role Settings: Use these settings to configure the behaviour of profile synchronization.	Role Action Registered Users Subscribers
If the user already exists: Use these settings to determine the module behaviour if the "source" user already exists in the "target" portal.	Synchronize Passwords Require Matching Password Synchronize email addresses Require Matching email address

the URL I want to redirect is page Home of main portal

and I created a standard user (ID : abc - PW: 1234567) and login in main portal but I recieved the report "login failure",help me plzzz,it's very important with me :

P/S: my portal is running in IIS 7 (windows 7) and SQL server express 2005