$this->upload->data() problem

[eluser]Mitja[/eluser]
i also get error

A PHP Error was encountered

Severity: Notice

Message: Array to string conversion

Filename: libraries/Upload.php

Line Number: 152

becouse i have the name of array

<tr><td>Fotka: &lt;input type="file" name="pluspayment_title_photo[]" /&gt;&lt;/tr>

and

$this->upload->do_upload('pluspayment_title_photo') can not except array.

How can i upload multiple file in array?

PLEASE