Unable to add an item inline via a search screen

I'm using Microsoft Visual Studio Lightswitch Beta 1 to create a simple application. I'm trying to create a search screen for a table that contains an Int32 filed called ID and a String field called Name.

If I customize my search screen and try to add an Add... button to my command bar of the datagrid, when I go to use the search screen and click Add..., I will get a pop-up windows that allows me to successfully add a new item by typing some text into the Description field.

I also tried to customize my search screen by adding an Add button (the Add... button uses a pop-up screen while the Add button is supposed to let you save in-line) to the command bar of the datagrid. However, when I use the search screen and click the Add button on the command bar, I see a new line show up with a *, but I'm not able to type text into the Description box. Therefore, I'm not able to use the in-line Add button to add data to a search screen. Is this normal?

Is there something I need to do to be able to successfully use the Add开发者_运维百科 button to add an in-line entry for a search screen in Lightswitch?