Check with these plugins too:

http://wordpress.org/extend/plugins/custom-post-order/
http://wordpress.org/extend/plugins/postmash/
http://wordpress.org/extend/plugins/postmash-filtered/

Thanks,

Shane G.

Add this code in htaccess and have a check:

php_value upload_max_filesize 20M
php_value post_max_size 20M
php_value max_execution_time 200
php_value max_input_time 200

This will allow you to upload up to max 20MB. You can change the limit according to your requirement.

Thanks,

Shane G.