Symantec Workspace Streaming off box SQL with windows authentication

I am testing the new version of Symantec Workspace Streaming and Virtualization 7.5. I have a need for instruction on how to configure SWS 7.5 backend to create new database and schema on to SQL 2008 R2 cluster environment with windows authentication. I was able to install everything in a single node (SQL database, backend, frontend) as product POC. I am now trying to test the off box SQL with separate backend server and frontend server. During the database configuration, I’ve tried manually create the database and SQL local user with rights at the SQL server and use the existing database option and existing account, getting failed to create database schema. Similar problem when choose to create new database.

thanks in advance...