[phpGroupWare-users] Warning: mcrypt_generic()

[ittspain]

Hi friends,

i am new here and i found this software. Its really good, but the only thing is 
when i click on "edit" in the adress book to make changes to a contact, i 
receive this message below on the top of the screen and on the bottom is 
everything normal.

Warning: mcrypt_generic() [function.mcrypt-generic]: An empty string was passed 
in /home/xxxxxxx/public_html/group/phpgwapi/inc/class.crypto.inc.php on line 171

Does anybody know how to repair that?

ThanksSent from the phpGroupWare forums @ http://forums.phpGroupWare.org