Failed to make Backup Exec 2012 Custom SDR DVD

Hi,

I failed to make Custom SDR DVD of Windows 2003 std Server. Backup Exec is installed locally to this computer. This is actually second time when I tried to make SDR DVD and had same problem. On "Creating the custom simplified disaster recovery disk image" part computer totally froze when it reached "Creating registry hives.." point?!

Any thoughts what can cause this problem?