Netbackup service and database down

I had raised a case with Severity 1 case and the technical gone without notice more than 2 hours so far. How a nice service which I need to paid a lot money.

Anyway, the problem is no matter I restart the service and even server, it can only went up for 1 or 2 minutes only, then the database will down. The last comment from your great support guy is

vxlogcfg -a -p 51216 -o 111 -s DebugLevel=6 DiagnosticLevel=6

after we run this command, error message had shown as below.

V-1-8-5 An unknown arguement DiagnosticLevel=6 was passed.

Please find someone to take a look about it!