Try these technotes:
http://support.veritas.com/docs/275032
http://support.veritas.com/docs/275017
This issue is could also occur due to a failure to register the Program Files\VERITAS\Backup Exec\NT\schedmgrur.dll library.
To register this file, perform the following.
1. Open a command prompt by clicking Start | Run, typing cmd, and pressing the ENTER key
2. Change the directory to the Backup Exec\NT folder by typing the command cd /Program Files/Veritas/Backup Exec/NT and pressing
3. Register the library by typing regsvr32 schedmgrur.dll and pressing .
4. If registered correctly, the message "DllRegisterServer in schedmgrur.dll succeeded" will be displayed.