Ask Dr. Bob: Exchange 2000 Backup Won't Work after Backup Exec Upgrade

Dear Friends..... " Error while backup of Exchange Information Store from Veritas Backup Exec 8.5 " Enviournment: Windows 2000 Server with SP3 Exchange 2000 Server with SP3 SAN Backup On other Server xxxxx Veritas Backup Exec 8.5 After Upgdating to Exchange Service Pack 3. I could Backup my Exchange Information Store Successfully.... How can backup success ??? ========================================================== Job server: Electronic Job name: Exch Daily Job started: Tuesday, February 18, 2003 at 7:07:32 AM Job type: Backup Log file: BEX10.txt =========================================================== Drive and media information from media mount: Changer Name: COMPAQ 1 Drive Name: COMPAQ 1 Media Slot: 2 Media Cartridge Label: DSO001 Targeted Media Set Name: Mail Daily ========================================================== Job Operation - Backup Media operation - append. Hardware compression enabled. ========================================================== Media Name: "Media created 2/17/2003 10:21:55 PM" Backup of "\\ELECTRONIC\Microsoft Information Store\First Storage Group " Backup set #4 on storage media #1 Backup set description: "Exch Daily" Backup Type: FULL - Database & Logs (flush committed logs) Backup started on 2/18/2003 at 7:10:57 AM. Access denied to database . ^ ^ ^ ^ ^ WARNING: "microtec-mail" is a corrupt file. This file cannot verify. ^ ^ ^ ^ ^ Log files Backup completed on 2/18/2003 at 8:17:00 AM. Backed up 2 Exchange Server store(s) Backed up Exchange Server logs 1 corrupt file was backed up Processed 28,660,048,510 bytes in 1 hour, 6 minutes, and 3 seconds. Throughput rate: 413.8 MB/min ---------------------------------------------------------- =========================================================== Job ended: Tuesday, February 18, 2003 at 8:17:45 AM Job completion status: Failed ===========================================================