Error when creating a linked server to IBM iSeries AS/400

I am migrating databases from SQL Standard 2005 (32 bit) to SQL Standard 2012 (64 bit) and getting errors when I create the needed Linked Servers to our IBM as/400. I scripted the as400 linked server from the 2005 server and created it on the 2012 server:
EXEC master.dbo.sp_addlinkedserver @server = N'AS400', @srvproduct=N'DB2 UDB for iSeries', @provider=N'MSDASQL', @datasrc=N'AS400'
EXEC master.dbo.sp_addlinkedsrvlogin @rmtsrvname=N'AS400',@useself=N'False',@locallogin=NULL,@rmtuser=N'USER_NAME',@rmtpassword='PSSWD'
(plus various sp_serveroptions)

I then verified that the MSDASQL Provider "Allow Inprocess" was checked and the Linked Server is listed as using the provider but when I try to view the objects under the "AS400" Linked Server I get an error saying: Cannot initialize the data source object of OLE DB provider "MSDASQL" for linked server "AS400". (Microsoft SQL Server, Error: 7303)

I was told to download and install OLEDB provider for DB2.  I downloaded DB2OLEDBV4 but when I try to install it I try to install it I get a OK Box saying: "Microsoft OLE DB Provider for DB2 requires the Microsoft SQL Server 2008 or later version.  Ensure that this version is fullfilled before installing Microsoft OLE DB Provider for DB2." when I click OK, I get "Setup was interrupted before Microsoft OLE DB Provider for DB2 could be completely installed" and the install exists.  I am installing on SQL 2012!

Can anyone please advise...