1 login the QC
2 Click “Add-Ins Page”.
3 Click “More Mercury Quality Center Add-ins”.
4 At the top of the screen, you can see the link “QuickTest Professional Add-in”, just click it.
5 Click “Download Add-in for QuickTest Professional 9.0”, you can download the TDPlugInsSetup.exe.
6 Set up TDPlugInsSetup.exe.
7 Restart your computer.
Sorry, I didn't meet that question,
maybe that is because of your QC configrations,
And can you tell me what's your computer, server or client?
In all, if you want to use QC, the configrations is very troubled.
if it is a server, you need set up JBoss 4.0,IIS 5.0/IIS 6.0/Apach2 .0.x on Windows Server 2003 Standard/Enterprise Edition(with JVM 1.4.2)
if it is only a client, you only need know the URL of the QC server.