lexical_cast problem with Unicode

I have problems compiling the following piece of code under Microsoft Visual C++ 6.0 with UNICODE defined. The compiler complains about a missing operator<<. What can I do in order to get this programme compiled ? #include <iostream> #include int main( int argc, char * argv [] ) { std::wcout << boost::lexical_caststd::wstring( std::wstring( L"test" ) ).c_str() << L"\n"; return 0; } c:\programme\boost_1_30_0\boost\lexical_cast.hpp(148): error C2679: binary '<<': no operator defined which takes a right-hand operand of type 'const wstring' (or there is no acceptable conversion) c:\programme\boost_1_30_0\boost\lexical_cast.hpp(146): while compiling class-template member function 'bool boost::detail::lexical_stream::operator <<(const wstring &)' Thanks in advance, Stefan