Hibernate - Redshift.

[ushaRG]

Hi , I have an application which is developed by using Struts and hibernate. now i am trying to connect AWS Redshift. My credentials are like (in Hibernate cfg file)
1)driver_class: org.postgresql.Driver
connection.url: jdbc:postgresql://host_name.redshift.amazonaws.com:5439/user
dialect: org.hibernate.dialect.PostgreSQL82Dialect

2)driver_class: com.amazon.redshift.jdbc4.Driver
connection.url: jdbc:redshift://host_name.redshift.amazonaws.com:5439/user
dialect: org.hibernate.dialect.PostgreSQL82Dialect(using this sincedont know the dialect name here)

both the cases I am getting
Error: Could not open connection: No suitable driver found for jdbc:postgresql:

I have added redshift JDBC & postgreysql jars also. I have no idea on this can anybody help me on this .