Why Hoogle is not working under EclipseFP on my machine?

Environment:

• Windows 8 x64
• Behind HTTP proxy
• Eclipse Version: Kepler Service Release 1 Build id: 20130919-0819
• EclipseFP 2.5.4 correctly installed and working
• Haskell Platform 2013.2
• Environment variable http_proxy is set correctly
• Machine has working internet on its browsers
• "hoogle String" is working as expected from command prompt (executed from the path that is found in EclipseFP settings - C:\Users\myuser\AppData\Roaming\cabal\bin\hoogle.exe) and return lot of results
• Clean installation of Haskell Platform, then Eclipse, then EclipseFP. All options are by default. After I installed EclipseFP it asked me to install build-wrapper and other utils. I installed them, too for the current user.

But search in Hoogle window in Eclipse is doing nothing. No error message, no search results, no nothing. What could be the problem? Could someone help me find it?

Look in the EclipseFP "Helper executables" preferences window if it is pointing to your Hoogle installation. If not, you may click the middle button (of those three besides the text box where the Hoogle address should be) to automatically find the correct installation in your machine.

If it is not the problem, I would advise you to reformulate your question and put more information, such a screenshot of your preferences window.

Anyway, follows a example of my preference window