Oracle APM 5.0 backup job fails with "Failed to get list of tablespaces using backup list" (4047872)

Affected Product & Version - NetVault: Backup 7.4.5
Affected Module & Version - APM for Oracle (Version 5.0)
OS Version - Windows 2000/2003
Application Information - Oracle 10.0.2.x & Oracle 9i


Symptoms:
When attempting to run a backup job for an Oracle Database under the Oracle 5.0 the job fails with:

Error 2007/09/24 10:30:32 254 Data Plugin nv_kerri Database selected, but cannot get the list of tablespaces
Job Message 2007/09/24 10:30:33 0 Data Plugin nv_kerri Program Finished with exit code -1073741502
Error 2007/09/24 10:30:33 254 Data Plugin nv_kerri Failed to connect to Oracle. Check account/password on Backup Job.


SQL*Plus connection works correctly with same user and password.