Hi,
Please confirm the following:
1. The SharePoint Agent is installed on the media server.
2. The Backup Exec Remote Agent for Windows Servers (Remote Agent) must be installed on each remote SharePoint Portal Server that will be protected. In addition, for SharePoint Portal Server 2003, the Remote Agent must be installed on each SQL server in the server farm.
3. The credentials specified by the logon account used for backing up and restoring SharePoint Portal Server data must have local administrative rights on the servers where SharePoint components are installed. Additionally, to back up and restore individual documents in workspaces or backward-compatible document libraries, the account must be granted the Coordinator role in SharePoint on all folders to be accessed in the workspace or document library.
Thanks!