tricky hql where clause

Hi,

I am trying perform select hql, but where clause is a bit tricky. I have two classes like this:
+++++++

public class Project extends ActionForm implements java.io.Serializable {

private Long projectId;
private Demographics demographics;
...
...

+++++++++++++

public class Demographics extends ActionForm implements java.io.Serializable {

    private Long demographicsId;//pk
    private Set projects = new HashSet(0);
...
...

+++++++++++

and it is 1 - N relastionship. I tried this in HQL editor, but didn't return anything.

FROM Project as project where project.demographics.demographicsId='1234'

What hql is going to look like in this case?

thx