Nostalrius Begins - Quality wow vanilla realm (1.12)

As I tested, some of the accounts I registered, can not able to use the email to change the account password, but some others will be able to do that. Since we cannot change the password in game, there is no way for me to try to change passwords for those accounts. Can you help me to solve that problems? The following accounts of me and my firends cannot change password thought email:

Name :gion /email:[email protected]
Name:Todii/email:[email protected]
Name:Tianqiong/email:[email protected]