You probably didn't add the badge as Platinum said you can do it by doing this:
Add the file to the /swf/c_images/album1584/ folder (File should be in the form NAME.GIF)
Go to /swf/gamedata/external_flash_texts.txt
Add the badge name by adding NAME_badge_name=This is the top bit that appears (be sure to change NAME to whatever the file was named, ours was NAME in this case)
Add the badge description by adding NAME_badge_desc=This is the bottom bit that appears (be sure to change NAME to whatever the file was names, ours was NAME in this case)
Add the badge to the badge_definitions table using this SQL (be sure to change NAME to whatever the file was names, ours was NAME in this case):
Code:
INSERT INTO `badge_definitions` VALUES ('NAME', '');
On your client say ':update badge_definitions' (NO QUOTES)