Problem with cookies

Ok.. i got admin cookies on a site…. but once i changed my cookies to the admin cookies it didnt change… i just have two sets of cookies,,, one set for me and the admin cookies, also i cannot do any of the admin stuff, does anyone know why this is.. i have tried google.. but its too vague and didnt give me a good answer. Help would be apreciated.

[edit] bad spelling [/edit]

make sure they deffo have changed by alerting your cookie. make sure you are injecting every single part of his cookie.

also it might not be possible as they could have features in place to stop, such as what HBH has in place.

If it's PHP-Fusion don't forget to add the memberid before the hash.

and yeah, alert your cookie to check if you injected right