unable to log into Netbackup GUI (Status 526)

Hi all

i'm having trobule with a box running redhat 5 and netbackup 7.1, i cant connect to the GUI, i get unbale to log in, status 526

From the log, i get the below -

Connecting to vnetd service over PBX port = 1556
ServerInterface:Logon:Exception encountered null
ServerInterface:Logon - Initial host:null, Current host:valorum, PBX port:1556
Can not connect to the NB-Java authentication service on valorum on port 1556.  Exception:
vrts.common.server.CantConnectToAuthServViaVNETDException

Any ideas what can cause this?

Thanks