Error copying update to local filesystem - Source DVD

Hey all,

I am trying to update RSA Authentication Manager 8.3 P 06 to RSA Authentication Manager 8.4. The machine is virtual and running on Hyper-v. The update iso is larger than 2gb so am using the virtual dvd drive to attach the ISO. The console sees the update and when I click Apply Update it starts the process however it fails when copying the update to the local filesystem. 

This is the original message;

[INFO] Mounting device DVD to /media.
[INFO] 
Caching update on DVD to /opt/rsa/am/updates/iso/DVD-8.4.0.0.0-build1404796.iso
dd: opening `/dev/cdrom': No such file or directory
Error: Failed to cache patch: /usr/bin/sudo /opt/rsa/am/utils/bin/appliance/cacheDVDUpdate.sh /opt/rsa/am/updates/iso/DVD-8.4.0.0.0-build1404796.iso exited with non-zero exit code
[INFO] Unmounting device DVD from /media.
[INFO] 
Failed to launch the update installer to apply the update AM 8.4.

I then logged onto the server and created the /dev/cdrom directory and provided write access (755) to it and recieved a different error;

Free Disk Space Check:
Required Free Disk Space: 6144MB
Actual Free Disk Space : 86534MB
[INFO] Mounting device DVD to /media.
[INFO] 
Caching update on DVD to /opt/rsa/am/updates/iso/DVD-8.4.0.0.0-build1404796.iso
dd: reading `/dev/cdrom': Is a directory
0+0 records in
0+0 records out
0 bytes (0 B) copied, 0.000733298 s, 0.0 kB/s
Error: Failed to cache patch: /usr/bin/sudo /opt/rsa/am/utils/bin/appliance/cacheDVDUpdate.sh /opt/rsa/am/updates/iso/DVD-8.4.0.0.0-build1404796.iso exited with non-zero exit code
[INFO] Unmounting device DVD from /media.
[INFO] 
Failed to launch the update installer to apply the update AM 8.4.

This is where my knowledge of linux runs out. Do I need to change the owner of the folder? Am I doing something wrong in creating the folder at all? I have tried to search the forums for "failed to copy the update" or "update from DVD error" but cant find anything related to this but happy to be proved wrong!