Saving Changes To Database, Errors

I'm using vs2008 programming in the latest vb.net and am pretty new to sql server. I looked up tuts and such to save changes to databases after I understood on how to connect to them get them to display and such. This is my code when I hit the "Save" button. It worked last time I was working on the program, now it doesn't, when I load up the program sometimes (i'm not sure why or under what circumstances) it'll load up the changes I made to the database through the datagrid and saved, but others it won't. What am I doing wrong? Here's my code:

Private Sub cmdSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdSave.Click
Try
Me.Validate()
Me.FinancialBindingSource.EndEdit()
Me.FinancialTableAdapter.Update(Me.myDataSet.Financial)
Catch ex As Exception
MsgBox("Update failed")
End Try
End Sub

edit: It saves, but not completely. By that I mean, it'll save, but i'm not sure if it actually saves to the database or not. It will load back up with the data that I modified fine..unless I change any code in the program. Even if I just add a comment, the data reloads with the original data. However, if I don't touch code, it'll save my data fine. Why does it do this?