QTP连接到TD，折腾了好几次都连不上

报：failed to connect to serverhttp://192.168.2.27/TDBIN/default.htm
在报错对话框中点击Detail，显示：
Your connection to the Quality Center server failed.
You must install the latest Quality Center Connectivity Add-in.
To install, on the main Quality Center Login window, click the Add-in Page link. Then click the Quality Center Connectivity link. On the Quality Center Connectivity Add-in page, click the Download Add-in link to download the add-in.

可是，我已经下载并安装了QuickTest 8.0 Add-in for quality center 了。
唉，真是不知道怎么回事，请高手指点。

 

解决方法：