Hello,
1. Backup Exec 9.1 does not support Intel Xeon processors, it supports only the Itanium prcessors, for this please refer to the follwing compatibility list:
Title : VERITAS Backup Exec (tm) 9.1 for Windows Servers - Software Compatibility List (SCL)
http://support.veritas.com/docs/261695
2. In order to backup the Intel Xeon processor you need Backup Exec 10.0 SP2:
Title : 10.0.5520 Hotfix 2 - Extended 64-bit (x64) Remote Agent for Windows Servers (RAWS) (Adds support for remote computers running 64-bit extended chipset Windows operating systems)
http://support.veritas.com/docs/278576
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