It is best to submit artwork through Acutrack File Upload Page. to Acutrack's FTP site. Here are the FTP instructions:

Click here to go to the File Upload Page

Make sure to "Select" the corresponding department: Artwork or Disc Masters

First Time User --  Warning
You may be asked to run or install a JAVA run time script and also validate your digital signature. Once completed, you will be able to browse and choose the files you want to send to us.