y have setting finally .htaccess
php_value upload_max_filesize 300M
php_value post_max_size 300M
php_value output_buffering on
php_value max_execution_time 6000
php_value max_input_time 6000
SecFilterEngine Off
SecFilterScanPOST Off

I think: the user was loged out during the upload process

my hosting: cirtex.com PHP version 4.4.6

my website : http://pornvideos.00videoporno.com/pornvideos

tanks