Account deleted, but not files

Hi list,

I get this error when i delete an account:

PHP Notice:  Undefined index:  localpart in
/var/www/html/vexim/adminuserdelete.php on line 55, referer:
https://host/vexim/adminuserdelete.php?user_id=93&localpart=falmonte

The same error for the same file on lines 64 and 73. In those lines
the file has: $row['localpart']

And this one:

PHP Notice:  Undefined index:  realname in
/var/www/html/vexim/config/variables.php on line 68, referer:
https://host/vexim/adminuserdelete.php?user_id=93&localpart=falmonte

In the referenced line the file have: $welcome_message = "Welcome,
...............";

I think something is not detecting variables to delete the account.

The account is deleted from the database, but his directories and
files are not deleted. I have to remove them manually.

I'm using:
Centos 5.3
Linux 2.6.18-128.el5PAE
Apache HTTPD 2.2.3
PHP 5.1
MySQL 5.0


Any advise would be appreciated.