No data available for SQL monitor

Hi,
I just installed a agent in a Windows 2012 server. it promptly auto discovered Windows, IIS and SQL servers installed in the same box and it started posting data from windows and IIS server. However, there is no data posted from MS SQL server.

I tried to troubleshoot unsuccessfully, as per No data recieved from SQL server

Please help to resolve this issue

With thanks in advance
Babu