[omniORB] Problem with Any type

[Le Flour Thierry]

Hi all,
i would like to code into a Any type a structure described in my IDL file.
I tried to do the following:
    CORBA::Any myAny;
    MyStructure aStruct;
        (* Filling the structure*)
        myAny <<= aStruct;

When i compile this piece of code , the compiler says :
    No matching for `CORBA::Any & <<= MyStructure &'
    /usr/local/include/omniORB4/CORBA_Any.h:69: candidates are: void 
CORBA::Any::operator<<= (cdrStream &)
    ...
I tried to cast with :
    myAny <<= (cdrStram &)aStruct
but , of course, it does work.
So, what i did wrong with this piece of code.
    Thank you
        Cheers.