Backing up a virtualized WinNT4 Server

Dear Forum,

I have virtualized a mission critical Windows NT Server 4.0 member server (SP6a) system.

But my BEX 2014 SP2 will NOT back it up within vCenter (ESXi 5.0)

It hangs and locks and forces a hard takedown.

BUT the system runs fine in vCenter and on the network.

I was wondering if anyone would know if it is because BEX 2014 simply does not work on NT systems.

Any info you could offer would be appreciated.

Thanks.

Rocky.