I am trying to connect to EJB on Jboss server via CORBA interface client.
First of all, the bean itself is pretty simple: the functional part that I
am testing now is just:

public String hello()
{
    System.out.println("In hello");
    return "Howdy!";
}

(I am skipping all EJB wrapping, of course) and it works perfectly via
RMI interface client. However, when I try to run it via CORBA interface
client, it either throws me this exception:

org.omg.CORBA.MARSHAL: No class description available (value_tag indicates
no type information present)  vmcid: 0x0 minor code: 0 completed: No

or just says: Exception in thread "main" java.lang.OutOfMemoryError

I tried another bean, which accepts and returns numbers - it works fine  
both with CORBA and RMI. So I guess it has something to do with strings.
But I don't know what exactly I am doing wrong. What I noticed is that
org.omg.CORBA.MARSHAL message appears when I define the hello operation in
IDL as ::CORBA::WStringValue hello( ); (that's roughly what rmic tool
generates), while OutOfMemory appears when I define it in IDL as just
"string hello( );". I couldn't find which of methods is the right one -
different manuals suggest different things.
And I couldn't find an explanation why neither of the methods work.

Any ideas?