can not commit the changes to the field with the type of date in the WFS-T service layer through Silverlight API

[BrookBrook]

        Hi,I can not commit the changes to the field with the type of date in the WFS-T service .The data is stored in Arcsde 10.1 enterprise geodatabase (Oralce11g 64 bit),When I call wfs-t service and edit the record via Silverlight API,  the field of date type can not be edited correctly,but the other fields including the shape actions correctly, The values in the database all becomes 00:00:00 no matter what values I passed . and It displays 1899-12-30T00:00:00 in the Silverlight client.

    Anyone can help me ? Thanks a lot !

[BrookBrook]

I try many formats as below:

1.Ticks 

2."2014-9-10 11:27:30"

3."2014-9-10"

4."2014/9/10"

5."9/10/2014"

6."date:20140910"

7."date:2014-9-10"

8."date:2014/9/10"

9."todate:20140910"

10."todate:2014-9-10"

11."todate:2014/9/10"

12."DATE:8/9/2014"

13."2014-12-30T00:00:00"

14."20141230"

but it does not work