Please go to your support forum and read the messages posted there: your account migration system is broken.

http://groups.google.com/group/feedburner-services/topics

"Another acct that can't be migrated" "Can't Migrate Acct" "Forgot username and email" "lost my FeedBurner ID"

And mine: http://groups.google.com/group/feedburner-services/browse_thread/thread/e6f6eb3e436126e3

There is no way to retrieve your feedburner user ID. I have successfully reset my password, but I am still unable to log in because "The username or password for your FeedBurner account was incorrect."

Please fix this! I have been trying to log in and turn off feedburner for months.