How to create a Linked Server from SQL Server 2012 to Postgresql

Hi, I am working on a third party application which is using Postgresql version 9 database and I am trying create a linked server in SQL Server 2012 using the below stored procedure.
EXEC master.dbo.sp_addlinkedserver @server = N'LINKEDSERVERPOSTGRES', @srvproduct=N'PostgreSQL',
@provider=N'MSDASQL', @provstr=N'Driver=PostgreSQL;uid=pguser;Server=pghost;database=pgdatabase;pwd=somepassword'
Error: Cannot initialize the data source object of OLE DB provider "MSDASQL" for linked server.
I have no clue if a jdbc provider exists in SQL Server to connect to Postgresql or what the right provider is? Could you please let me know if there's a workaround to achieve this.
Thanks in advance............
Ione

See if this helps
http://www.postgresonline.com/journal/archives/46-Setting-up-PostgreSQL-as-a-Linked-Server-in-Microsoft-SQL-Server-64-bit.html
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