Upload filetype not allowed??

[eluser]Sundance[/eluser]
Hi guys,
I have a similar issue even though I am already using 2.1.2. The problem is that the upload works fine locally using Xampp but not remote on my hoster's server.

I am trying to upload an sql file. My initialization is:

Code:

$config['allowed_types'] = 'sql';
$config['max_size'] = '2048';
$this->load->library('upload', $config);

My mime type is setup like this:

Code:

'sql' => array('text/x-sql', 'application/octet-stream')

By debugging I could trace that /library/Upload.php::do_upload() returns FALSE at line 207ff:

Code:

// Is the file type allowed to be uploaded?
if ( ! $this->is_allowed_filetype())
{
   $this->set_error('upload_invalid_filetype');
   return FALSE;
}

$ext and $mime contain the correct values in the function is_allowed_filetype(). And as I said, it works locally with Xampp 1.7.7 with PHP 5.3.8 while my hoster is running PHP 5.2.17.

Any ideas on this one?

Best regards,
Sundance