Thanks for your quick reply Mailbeez. Ok. I think I going worst. Look. I followed your advice. Deleted the files, upload the new files... first I unistalled all the modules. I went to the DB and copy/paste
DELETE FROM `configuration` WHERE `configuration_key` LIKE 'MAILBEEZ_%' But is answered #1146 - Table 'ohmy_zc1.configuration' doesn't exist

I log off from the admin, log in... and install everything. Great. Now when I see the Birthday HTML... it show

"Notice: Constant TABLE_MAILBEEZ_TRACKING already defined in /home/ohmyosc1/public_html/includes/extra_datafiles/mailbeez.php on line 23

Notice: Constant FILENAME_HIVE already defined in /home/ohmyosc1/public_html/includes/extra_datafiles/mailbeez.php on line 25

Notice: Constant GZIP_LEVEL already defined in /home/ohmyosc1/public_html/includes/init_includes/init_db_config_read.php on line 24

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/ohmyosc1/public_html/includes/extra_datafiles/mailbeez.php:23) in /home/ohmyosc1/public_html/includes/functions/sessions.php on line 108

Notice: Constant TABLE_STORE_CREDIT already defined in /home/ohmyosc1/public_html/includes/classes/store_credit.php on line 31

Notice: Constant OFFICE_IP_TO_HOST_ADDRESS already defined in /home/ohmyosc1/public_html/includes/languages/english/email_extras.php on line 52

Warning: Cannot modify header information - headers already sent by (output started at /home/ohmyosc1/public_html/includes/extra_datafiles/mailbeez.php:23) in /home/ohmyosc1/public_html/includes/init_includes/init_templates.php on line 78

Notice: Undefined property: birthday::$additionalFields in /home/ohmyosc1/public_html/mailhive/common/classes/mailbeez.php on line 67
Happy Birthday!

and the rest of the html with the cake.