Configure the server - open to bidding

Hi! I'm Laurynas from Lithuania, I have server with Debian on it with CMS where user can upload a video file and server converts it to .flv and displays a link or user uploads .torrent file, server downloads largest media file in it and converts it and outputs the link. There is very little space left on that server, so we are moving to a bigger server, it has centOS on it. All files are moved apache installed, php also, mysql is connected but some functions like uploading a video file or conversion don't work. ffmpeg converter is installed, but it does not convert, and uber-uploader, uploader that server uses outputs an error "ERROR: Failed to find flength file". So, the job would be to finish configuration fix those two features and install the same CMS on the other HDD because now only half space of VDS is used. Waiting for respone as soon as possible. Regards Laurynas