Problems restoring vSphere 5.1 machines

Hi all,

this is our environment:

  Master and backup Host: Windows 2008 R2 

  vSphere version: 5.1 

  Netbackup version: 7.5.0.5

  Vmware clients OS: windows 2008 R2 and RHEL

  Policy type : FlashBackup-Windows using SAN transport and the backup Host (master).

and this is our issue:

  backups are working properly, and the restores seem so, but restored machines can´t boot. It happens for 2008R2 clients and also for RHEL:

       -Win2008 clients says Operating system not found when trying to boot.

       -RHEL clients hangs on boot too, in this case while some services are being started.

  After reading other similar issues, I checked that disk on backup Hosts are Online and that 2008R2 is installed with the 100Mb partition for boot(standard installation).

Is there anything that we are doing wrong? Has anyone faced this before??

Thanks in advance.