Product:
Cognos Controller FAP 10.1.1
Cognos TM1 10.2.2
Windows 2008 R2 Server

Problem:
When starting the FAP service, where we use Cognos BI CAM authentication, we get a error in the logs that say:
“Could not login to TM1, host: , server name: , user name: <namespace\username>”
C8ITKShared (C:\Program Files\IBM\cognos\TM1_64\bin64\ C8ITKShared.dll is not a valid Win32 application.)

Background:
TM1 10.2.2 64 bit server installed to same Windows server as the Controller FAP Service.
The Windows FAP Service are 32 bit and uses 32 bit dll.
The new FAP client is 64 bit and uses the 64 bit dll and database drivers.
Default install of TM1 10.2.2 only install 64 bit dll files for TM1.

Solution:
Install TM1 Architect in 32 bit version to the server.
Add the path to the C8ITKShared.dll to the system path e.g. C:\Program Files (x86)\IBM\cognos\TM1\bin.
Right click on My Computer and select properties
Click on Advance System Settings
Click Environment Variables
Select PATH and click Edit
Update the path and save.
Click OK to exit dialog.
Restart the Server.

More Information:
http://www-01.ibm.com/support/docview.wss?uid=swg21450399