BackupExec 2014 Linux agent not installing

Hello,

I'm running BackupExec 2014 (14.1 1786) on a Windows 2012 R2 server. I'm trying to install the Linux agent on a turnkey Linux appliance (Debain)

When I browse to the installation DVD and try to unpack the file RALUS_RMALS_RAMS-1786.0.tar.gz from the LinuxMac folder, I get the error message from Winrar "Archive is either unknown format or damaged"

Also using TAR from the Linux commandline doesn't work.

What am I doing wrong?

Regards,
Oliver McLean