OpManager - CMDB plugin

OpManager - CMDB plugin

Hi there,

I'm trying to install CMDB plugin for OpManager (x64) from the following site:
http://www.manageengine.com/network-monitoring/cmdb-download.html

I chose the 64 bit option and successfully downloaded the file.
Filename: ManageEngine_OpManager_CMDB_PlugIn_64bit.exe
When the installation was started, I was presented with the following install wizard box:



Why? Maybe they put the wrong file???
Not sure if it's related ... I have ServiceDesk Plus running on the same server.