I have new email address and i moved all the contacts from the previous one. All the moved contacts is in the Address Book group, not in the Friends group, so I tried to add them one by one, and I can only add around 5 contacts per day, if I add more, it will say,
"Your request to add a contact has taken longer than expected to complete.
The operation may have succeeded. Please check your Messenger List later."
and the contact was not added. I tried adding the contact again and the same thing happened.