HTTP_COOKIE not working for all users

We just moved a working web application to a new server. The app is using HTTP_COOKIE to save/retrieve user info.

Now, on the new server only, and only for some users, HTTP_COOKIE is only saving the domauthsessid cookie, and not my app’s cookie. (so in some instances 2 cookies are retrieved into HTTP_COOKIE, in other instances only one, domauthsessid)

The users who are experiencing the problem are all located in a secondary directory, but they ARE able to authenticate before the cookie problem arises.

does anyone have any ideas?

thanks

barry