Oracle OCCI libraries and Visual Studio 2005 - problem running some existing application

[Lost User]

I am trying to run existing C++ application which uses Oracle OCCI libraries. For example in Linker->Input this project has specified oraocci10.lib. I would really appreciate if I get some help here because I am stuck on my own. I am using Visual Studio 2005. Here is list of actions I did. Please see if I missed something or did wrong. 1) Downloaded instant client packages 10.2.0.5 from here(1st and 5th packages- Basic Lite and SDK packages):http://www.oracle.com/technetwork/topics/winsoft-085727.html 2) Set environment variables (it seems there was some Oracle client already installed ? please see paths below): ORACLE_HOME: C:\app\g\product\11.2.0\client_2; TNS_ADMIN: C:\app\g\product\11.2.0\client_2\Network\Admin Some oracle client seems to have been installed here: C:\app\g\product\11.2.0\client_2?(Because path was there and files). 3) Set paths to oracle libraries in my project: C/C++->General->Include directories: D:\instantclient_10_2\sdk\include Linker->Additional Library directories: D:\instantclient_10_2\sdk\lib\msvc 4) In Code Generation->Runtime Library: Multi-threaded DLL (/MD), for release version. My application compiles but I get run time errors. When I run this application as a standalone exe (without compiling the executable, I was given that exe separately also) it works fine, connects with the database, etc. So something must be wrong how I configured Visual Studio against these OCCI libraries. I would really appreciate some help where I have gone wrong, as I am nearing point where I can't guess what I have done wrong. NB: Please note I have not downloaded anything except instant client packages like I mentioned above. Some Oracle Client installation was already on my computer - available on this path: C:\app\g\product\11.2.0. What am I missing? In particular some references I have seen mention downloading OCCI but like I said I didn't download OCCI - just instant client packages; and some Oracle client was already installed on my PC and available here: C:\app\g\product\11.2.0\client_2. Thanks in advance