Could not find TimePicker control in SilverLight

Hi

I need to use the date picker and time picker.

I can able to find the date picker in my tool box but i cant able to find the time picker in the tool box.

I tried to choose the item by right clicking on the "Common Silverlight controls" which is in "toolbox" and select "choose item" and search for the time picker but i cant find it.

I also added the references to the system.windows.control.toolkit.dll but it is also no use of it.

Can any one give me an idea about how to get the time picker in my silverlight application.

thanks.