Hello,
Check out this document to verify the BESA permissions
also
check your services in Windows and make sure they are running as the following:
•Backup Exec Agent Browser server: start up type - Automatic and logon as Domain\Username
•Backup Exec Job Engine Service: start up type - Automatic and logon as Domain\Username
•Backup Exec Server Service: start up type - Automatic and logon as Domain\Username
•Backup Exec Device and Media service: start up type - Automatic and logon as Domain\Username
•Backup Exec Remote Agent servicestart up type - Automatic and logon as local system account
•SQL Server (BKUPEXEC) - Automatic startup and log on as Local System account
then verify the password by going to properties click on Log on and re enter the password of the 'Username" (same as the System Default Logon for BackupExec)
hope this helps