I installed QODBC Server Edition V8 to local machine (without install a copy of QuickBooks) and remote machine (with a copy of QuickBooks). 

From local machine, I try to open the QB File located on remote machine. It works fine with Remote Connector, but it doesn't work with DCOM Server with error: [QODBC] QB Open Connection Failed. Error = 80040154, Unknown Error.

I did a search for above error, it said that I FIRST MUST need to allow QuickBooks accept QODBC application login.

When I try open QB File with Remote Connector, the QuickBooks application on remote machine poped up the "QuickBooks - Application With No Certificate" dialog to allow me to select user login.  That is perfect

However, when I try to open QB File with DCOM Server, the QuickBooks application on remote machine does not pop up the "QuickBooks - Application With No Certificate" dialog for me at all. Of course, I connect to remote machice with server console.

 My questions are:

1. Do I need to install a copy of QuickBooks on local machine in order DCOM Server to work?

2. With DCOM Server configure, QuickBooks application in remote machine needs to be opend or closed?