1. try checking your server and client if they have the same time.
2. try checking your ntp server if it is properly configured.
3. check if ADMIN_adjust_GMTnow_on_leads.pl is running.
4. rerun /home/cron/ADMIN_adjust_GMTnow_on_leads.pl
5. verify in astguiclient/admin.php that you have the correct GMT
i would really recommend that everytime u have an update in your configuration scripts such as (agi, * config , pl, etc) you have to restart asterisk and if possible restart the server
i can only see AST_VDauto_dial.pl not AST_auto_dial.pl