Auto completion in DlangIDE

[user]

For some reason auto completion in DLangIDE never worked for me. 
I need some suggestions.

How to trigger the auto completion?
Can I just type '.' after an object and will the auto-completion 
popup? This does not work for me.

Should I hit any shortcut key?
I tried ctrl+space, alt+space, shift+space, no effect.

I am using pre-compiled DlangIDE 0.8.5 on windows-7, using latest 
DMD.

Any help is appreciated.