Cookie not received in NotifyUser

[sekarcse]

We're making use of the Dot net Adapter.

On the client-side:
We've set the cookie handling requirement to "true" with the line client.connectionOptions.setCookieHandlingRequired (true).
After examining the client-side, it's evident that cookies are included in the request header.
However, on the server-side, we're encountering an issue where the cookie isn't being received in the NotifyUser function.

On the server-side:
I've configured the following settings in my adapter XML:
<use_protected_js>Y</use_protected_js>
<forward_cookies>Y</forward_cookies>

Despite this configuration, the cookie is not being received in the header. Is there anyone who can provide assistance with this problem?
C# meta data adapter
public override void NotifyUser(string user, string password, System.Collections.IDictionary httpHeaders)