Quickbooks Integration problem

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C#

ASP.NET

SQL-Server

Hello,

I am integrating the QuickBooks Pro application with my web application(Service) via web connector. It's working fine on my local machine.

But when I am trying to connect it from my local machine to web service which is on server, It's giving me the problem of QBSessionManager. It does not return any XML.

The error they show is as follows:
Retrieving the COM class factory for component with CLSID {6C9E80E3-B780-4361-A693-5E5C6BDC83A9} failed due to the following error: 80040154.

I've searched on net and many of the sites specified that it's the problem of 64-bit and 32-bit OS machine

My webserver is a 64-bit machine and Quickbooks application works on 32-bit machine.
so I've changed the setting of my server to 32-bit machine using IIS. but then also my problem has not been solved.

Can you tell me any other solution to make it work on server? and
one more doubt that I want to ask you is:
Is it necessary to install QBSDK on server machine?

I will appreciate if you could get back to me.

Thanks and Regards,

Dipti