Could not log in to SQL Server

The Provisioning server used Windows Authentication while the SQL server is on a different machine.
Because of this I keep receiving a database error. I cannot even log in because of this error.
The Provisioning Server is Version 5.0 under Win 2008 and SQL 2008.
How can I fix this?

Provisioning Server Console
A database error occurred.
Critical Error
Login failed. The login is from an untrusted domain and cannot used with Windows authentication.
