Workflow Tasks Content Type Forms

I am using the Workflow Tasks List.  There a 3 default forms.  One of which is EditForm.aspx.  I have 3 Custom Content types using this list.  In each content type I've created a custom form (ie... ContentType1EditForm.aspx, ContentType2EditForm.aspx).

In Designer under Forms in the Content Type I've entered the name of the form.

The Workflow Tasks List the forms show but not as default. When a task is sent the link opens the DisplayForm.aspx default.  When I click Edit Form, the default EditForm.aspx is displayed. 

Is there a way for Sharepoint to know the content type and open the appropriate Edit form?  OR do I need to have a separate task list for each content type to accomplish this?

Thanks.

Tom