An error has occurred on uploading.

Hi,

I get this error when I try to upload a (very small) picture.
On my Xampp installation everything is ok !!

But on the providers webserver I get the message:

"An error has occurred on uploading."

If I look via FTP in the directory
'assets/uploads/files'

the file is uploaded, but there is no entry in the table.

The debugger says:
Severity: Warning
Message: Cannot modify header information - headers already sent by (output started at /homepages/0/dxxxxxxxxxxxx/htdocs/m_und_d/error_db/application/controllers/Main.php:380)
Filename: libraries/Grocery_CRUD.php
Line Number: 1442

function simple_upload()
{

    $crud = new grocery_CRUD();
    $crud->set_theme('datatables');
    $crud->set_table('tabImages');
    $crud->set_language("english");
    $crud->columns('headline');

$crud->fields('headline','file_url');
$crud->set_field_upload('file_url','assets/uploads/files');

    $crud->unset_delete();
    $crud->unset_clone();

    $output = $crud->render();
    $this->_example_output($output);
}

Anyone an idea ?

An error has occurred on uploading.

Lurchi