Thanks for all your valuable suggestion and it's really helped me to move forward. Now I am facing one strange behavior. One application I developed Windows based (compiled in x86 mode) and this application is working perfectly on 64bit Machine with Windows 2008 R2 but once I deploy ASP.net application (Web application) on same machine then it throws same error.
Retrieving the COM class factory for component with CLSID {C5CBD7B2-490C-45F5-8C40-B8C3D108E6D7} failed due to the following error: 80040154.
Same ASP.net application works perfectly in 32 bit machine. QC Addins installation has been successfully.
I am really not able to understand cause of this issue. I will appreciate if you can help me to find solution of this issue.
