I am setting a couple of cookies, the values of these cookie's are being reset after a user logs in!!!.

 Any one any ideas why the values are being reset?

Any help appriciated

Steve

 is the web address of your login page the same as that of your site? if the domain (www.mydomain.com) changes in any way between your login and your site, the cookie would change. 

Try this:

 clear your cookies on your browser.  login to your site.  Check the contents of your cookie folder.  If there is more than one cookie, you have a difference in your domain.

--JJ
 

Please share some of your code including how you do the hand off after log in and how you set the cookie and inspect the cookie values.

--JJ