NetBackup Volume Manager/Device Manager not starting on media server

HI,

I do have a problem on a media server (2008 R2). The services NetBackup device Manager and Volume Manager do not start.

As "error" i do have this in the windows event log viewer :

Failed to validate this host with the EMM server

Could not start the NetBackup Volume Manager service: La zone de données passée à un appel système est insuffisante. (122)

terminating - the operation requested has failed (163)

I've found only this KB but i've checked and everything is ok :

http://www.symantec.com/business/support/index?pag...

Any help would be apreciate:) thanks in advance ! 

Regards,

Grimnar