Instance of c# class can't be null checked from javascript

Hey guys,

I have a weired problem here.

I wrote a model class in C# named Pilot. Creating instances of that class and use these instances works fine both from C# and Javascript scripts. But if I try to check if an instance of my class is null, I always get true from Javascript no matter if it is instantiated or not.

I just moved my Pilot model class from Javascript to C#. The check worked fine when it was Javascript. Is there an issue with checking C# instances for null in Javascript? I am doing the checks in a method which is called from the OnGUI() method.

My code looks as follows:

 var isHovered:boolean = hoveredPilot!=null?pilot.getUserName()==hoveredPilot.getUserName():false; 

isHovered is always false because hoveredPilot!=null always evaluates to false. I did some further checks:

 var pilot1:Pilot = null;
 var pilot2:Pilot = new Pilot("JohnDoe");
 Debug.Log(pilot1==null);  ( => prints "True" to the console) 
 Debug.Log(pilot2==null);  ( => prints "True" to the console)
 Debug.Log(pilot2.getUserName()); ( => prints "JohnDoe" to the console)

When I do

 Debug.Log(pilot1.getUserName());

the program crashes with a null reference error message (as expected).

What really puzzles me is why the null check for pilot2 returns true but on the next line I can retrieve the user name variable from the object.

Any suggestions what I am doing wrong? How should I check if an instance of the Pilot class is null?

Thanks in advance, Henrik