[CForm]Cocoon form sample doesn't work

[Christina]

Just tried the cocoonform sample http://localhost/samples/blocks/forms/form1 and http://localhost/samples/blocks/forms/form1.flow both of them doesn't work. There is always error on the "altbirthdate" widget, the error message is "invalid date format". (woodyform using action(cocoon2.1.4) seemed to have the same problem but woodyform using flowscript did work!) I deleted this albirthdate widget from the template, then nothing happens when clicking on submit. It doesn't go to the success pipleline. It seems that there is something wrong with the submission,  because there is no output from " print("submitId=" + form.submitId);" of form_flow_example.js Would anybody please tell me how to fix it? Thanks!