Backup Exec backup jobs stuck

Hi,

I am using the Backup Exec 9.1 for Windows server (on a Windows NT 4 Workstation platform) and the Domino Agent.

I am doing a full backup of the domino 6 server daily.

Everything works fine, but sometimes the scheduled jobs started like expected but stuck with the first database.

I have to cancel the job and the next day the scheduled job works like a charm.

Any help would be appreciated.

Thanks

Frank