I had a look at your project.
The Burthday column is in the database and is displayed when you show the Edit activity.
Clicking on an item raises an error.
Why did you change the value in this line in the Sub WebView1_OverrideUrl routine in the Edit module ?
values = Regex.Split("[.]", Url.SubString(8))
It must be :
values = Regex.Split("[.]", Url.SubString(7))
like in the original project in the User's Guide, and it works !
The same in the WebView module !
I saw in your layouts that you have several different screen resolutions !?
You should be coherent in the layouts.
What devices are you targetting ?