after enter my serial number, he said that to use adobe creative suite 5 master collection you must provide an adobe ID, i entered my adobe ID and password and after that he tell me that, we are enable to start your subscription for adobe creative suite 5 master collection , please choose close and then re-laungh ur product !!!
This is a user to user forum, not Adobe support... you need to contact Adobe
Adobe contact information
In the US - Adobe General support 800-833-6687 M-F 5am-7pm Pacific
In the US - Adobe Install Problems 800-642-3623
In the US - Adobe Activation 866-772-3623 Open 24/7 as far as I know