Little bit about DB Vault and FNDCPASS.

Recently 11i is certified with Database Vault. Nilesh explained the details in the blog http://blogs.oracle.com/schan/2008/02/07#a2375.
Metalink note ID to integrate ebiz suite 11i with 10.2.0.3 is 428503.1.
If you look at the note, you will see once you integrated Ebiz 11i with Database Vault, you will use Database Vault User account manager user or the user which has been granted DV_ACCTMGR Role to change the password instead of system password in FNDCAPSS utility.
to Change apps password when 11i integrated with db vault

FNDCPASS apps/appspassword 0 Y DV_ACCTMGR/DV_ACCTMGR_Pass SYSTEM APPLSYS NewAppsPassword
to change other schema passwords
FNDCPASS apps/appspassword 0 Y DV_ACCTMGR/DV_ACCTMGR_Pass ORACLE AP/AP_PASSWORD
This is newly introduced to handle db vault situation.