[FLOW3-general] A question about Extjs datefield and FLOW3 \Datetime type property

[Davide CD]

Hi,
I have a FLOW3 Entity with the property "startDate", with get and set functions. The set function, has a  \Datetime $startDate parameter.From ExtJS, as startDate property I send strings like this one: "2012-07-04T00:00:00". When i try to save my date in the DB, the field "startDate" is always NULL.
I thought, that strings like that one, would be converted directly into a datetime object, but it doesn't seem to be so. 
Am I doing something wrong?
Thanks for your support,David