Error when creating an individual

Hi all,

I'm new to Drupal and i installed drupal 6 with mysql database with the manual found on drupal.org.
Now i've imported the family tree module. Everything went well there and i can see the module is active in the menu.
When i create a location everything works fine and the location is created. The same is for group.
But when i try to create a individual i got an error:

user warning: Incorrect datetime value: '' for column 'deathdate' at row 1 query: INSERT INTO family_individual (vid, nid, title_format, firstname, middlename, lastname, gender, birthdate, birthplace, deathdate, deathplace, ancestor_group) VALUES (14, 14, 'FRANKEN, David - 1984', 'David', 'Test', 'Franken', 'M', '1984-12-05', 'Ceub', '', '', '') in C:\inetpub\wwwroot\drupal\sites\all\modules\family\individual.inc on line 118

I already searched the current open issues and found an old post dating back to 2005 stating that somebody else also got the same problem. I download the suggested patches, but this didn't do the trick. The user made his own hack and made it work, only i don't know how he did it.

Anybody else got suggestion how to resolve this? Maybe its how i set my database? Character set maybe the issue? It set now on UTF-8. Maybe it has to be Latin?

Best regards,
David