Relocation error

When I execute this code under apache:

${
   use "codex.http";
   State s = getState();
   Session session = s.getSession();
   String username = <String>session.get("username");
   if (username == null) {
      sendRedirect("login_form.moto?sid="+getState().getSID());
   }
}$

everything is ok. But if I try to execute it from the command line:

[devel@localhost moto]$ moto  index.moto
moto: relocation error: /usr/mx/codex/http/libmx_codex_http.so: undefined 
symbol: getState

I get this relocation error. Does anyone understand where the problem is?

Thanks,
	Stefano