all user status change to unconfirmed

Hi all of Dolhpin expert I've little tings to share and ask here

I've success migrate my Dolphin site from 6.1.6 to Dolphin 7b8 to Dolphin 7RC with 3090 users but my I've problem also,

my problem is all of my user status change to unconfirmed. I try to change it to Active but in a few minutes the status change to unconfirmed again and again.

Any Dolphin users face this problem?

TY

After make a research and trial and error i found what is make the problem. it caused by facebook connector. i saw that when a facebook user login all of my existing user become Unconfirm.

any idea?