Crystal Report not work when deployed to server

Never used Crystal, so bear with me.

I’m using Crystal Reports 2008 (Version 12.0.0.683) Product Type : Full

From my .net project (asp.net mvc 4 / c#) on my local machine I can generate reports just fine. I create the reports in the background and convert to pdf. Not using the viewer at all.
However uploading to the server give me errors like:
“Could not load file or assembly 'CrystalDecisions.ReportAppServer.CommLayer, Version=12.0.1100.0, Culture=neutral, PublicKeyToken=692fbea5521e1304' or one of its dependencies. The system cannot find the file specified.
“
or
“An error has occurred while attempting to load the Crystal Reports runtime. Either the Crystal Reports registry key permissions are insufficient, or the Crystal Reports runtime is not installed correctly” when I try to run the report.

I downloaded and installed various redistributable s but the problem is I do not know what is the right redistributable and if there are other steps involved.

The server is Win Server 2008 Server 64 bit and I’m using IIS 7.