Cognos 8.2 and InfoSphere OLAP data source. Help please!

[Jfrom]

We recently purchased the Infosphere V 9.5 Data warehouse product and want to use the OLAP cubes with our existing Cognos Windows 8.2 version. After several failed attempts to create a data source I am at a loss how to do this. IBM and a IBM business partner told us we would be able to use Cognos 8.2 with Infosphere and is the reason why we purchased Infosphere. Now they are saying that I have to upgrade to 8.4 in order to get it to work. Can anyone tell me if its possible to create a data source connection in 8.2 to Infosphere?  I tried to use the Hyperion (SP?) connection but it says ESSAPI.DLL is not found. 

If it is possible can you send instructions please?

Thanks!