Asking Log credentials for a second BSP Application

HI All,

In my BSP application I'm facing an issue with logon screen.

I have two BSP Applications. First application (Say App1) is a standard CFolder Application.

From App1 a custom BSP application (say App2) is being called.

Both Applications are in the same Server.

Using standard logon screen user logs into app1 and from there, using a button click user opens App2 in a new window.

This works for most of the users, But for some users, on clicking button for app2 , again system asks for logon credentials.

and in the logon screen the warning message "SSO logon not possible; browser logon ticket not accepted" is being displayed.

I checked the following things in client system.

1) Value for profile parameters

login/accept_sso2_ticket = 1

login/create_sso2_ticket = 1

2) Run the report "system_test/test_sso2.htm", the output says that “NO SSO2 Cookie found!”.

3) I wrote a test JavaScript program to find whether cookies are enabled for the system. Cookies are enabled and I'm able to read and write value to an own cookie, but while retrieving the value for cookie "MYSAPSSO2" it's returning null value.

(But the same code returned the encrypted values for "MYSAPSSO2", in working systems)

Can any one suggest me why the 2nd application is asking for logon credentials? (Or why it's not writing SSO2 cookie to some browser)

Customer is using IE6 in all systems.

Best Regards

Geogy