scaling in php

hi,
when i upload an image 708kb, 630 x 2197, using ckfinder integrated into fckeditor it get scaled down to 344 x 1200. why is that happening
i changed the variables in the config.php to
$config['Images'] = Array(
'maxWidth' => 2000,
'maxHeight' => 3000,
'quality' => 80);

to rest of the settings i didn't change

$config['SecureImageUploads'] = true;

$config['CheckSizeAfterScaling'] = true;

$config['ResourceType'][] = Array(
'name' => 'Images',
'url' => $baseUrl . 'images',
'directory' => $baseDir . 'images',
'maxSize' => 0,
'allowedExtensions' => 'bmp,gif,jpeg,jpg,png',
'deniedExtensions' => '');

i altered these above but still the same thing is happening
thx