Problems with sticky session ID- login "OK" but not logged in (via Web Services API)

I am using C# and our Connect Pro server is hosted by Adobe. I am having issues when I login with a POST httpWebRequest. I form the POST web request and send it off with Action=Common-Info. I get a valid response and pull the session ID and account-id out of the XML. I then pass the login, password and session ID to the Action=Login. I get a response of OK but when I try my next request that requires login I get a response that says "no-access", "no-login". I verified that I sent the same sessionID each time. I even tried to send the group ID but got the same response. Also, when I resent the Common-info call including the session ID, I got the same response... a response without the "user" node as I would get in the browser.

I am refering to the login method as perscribed in the documentation below:
Log in using the session parameter

Before you log the user in, call common-info to get the value of the BREEZESESSION cookie: http://example.com/api/xml?action=common-info

Extract the cookie value from the response:<cookie>breezxq66rt43poai3if8</cookie>

Log the user in, specifying the cookie value: http://example.com/api/xml?action=login&login=bobs@acme.com
&password=football&session=breezxq66rt43poai3if8

Parse the response for a status code of ok.
Use the session parameter with the same cookie value on subsequent calls for the user, until the user's session ends:https://example.com/api/xml?action=principal-list
&session=breezxq66rt43poai3if8

When the user logs out or the user's session ends, do not reuse the cookie value.


Help much appreciated.

Thanks!

Rob