minimized C# app - button click doesn't work

Hey, guys.

There is small software which uses .NET (i guess it created in C#). It has main window with one Edit and Button controls.

I need to input some text to the Edit and click to the Button with AutoIt.

When i work with visible window - all is okay.
But if window is minimized to tray - Edit takes my text, but Button isn't be clicked.

And i noticed when click doesn't work - a small .NET window appears, but it isn't visible so i cant swtich to it.


Tell me please how can i fix clicking?