'((System.Exception)($exception)).Message' Threw An Exception Of Type 'System.NotSupportedException'

Greetings everyone, I am attempting to build my first application using Microsofts Sql databases. It is a Windows Mobile application so I am using Sql Server Compact 3.5 with Visual Studio 2008 Beta 2. When I try and insert a new row into one of my tables, the app throws the error message shown in the title of this topic.
'((System.Exception)($exception)).Message' threw an exception of type 'System.NotSupportedException'



My table has 4 columns (i have since changed my FavoriteAccount datatype from bit to Integer)
http://i85.photobucket.com/albums/k71/Scionwest/table.jpg

Account type will either be "Checking" or "Savings" when a new row is added, the user will select what they want from a combo box.

Next is a snap shot of my startup form.
http://i85.photobucket.com/albums/k71/Scionwest/form.jpg



Where it says "Favorite Account: None" in the top panel, I am using a link label. When a user clicks "None" it will go to a account creation wizard, and set the first account as it's primary/favorite. As more accounts are added the user can select which will be his/her primary/favorite. For now I am just creating a sample account when the label is clicked in an attempt to get something working. Below is the code used.


private void lnkFavoriteAccount_Click(object sender, EventArgs e)

{

FinancesDataSet.BankAccountRow account = this.financesDataSet.BankAccount.NewBankAccountRow();

account.Name = "MyBank Checking Account";

account.AccountType = "Checking";

account.Balance = Convert.ToDecimal("15.03");

account.FavoriteAccount = 1;//datatype is an integer, I have changed it since I took the screenshot.

financesDataSet.BankAccount.Rows.Add(account);
//The next three lines where added while I was trying to get this to work.
//I don't know if I really need them or not, I receive the error regardless if these are here or not.



this.bankAccountTableAdapter1.Update(financesDataSet);

this.financesDataSet.AcceptChanges();

refreshDatabase();

}


the refreshDatabase() code is here:


private void refreshDatabase()

{

this.bankAccountTableAdapter1.Fill(this.financesDataSet.BankAccount);

//Aquire a count of accounts the user has

int numAccounts = financesDataSet.BankAccount.Count;

//Loop through each account and see which one is the primary.

for (int num = 0; num != numAccounts; num++)

{
//Works ok in frmMain_Load, but when my lnkFavoriteAccount_click calls this, it throws the error.

if (this.financesDataSet.BankAccount[num].FavoriteAccount == 1)

{
//Display the primary account on our home page. User can click the link label & be taken to their account register.

this.lnkFavoriteAccount.Text = this.financesDataSet.BankAccount[num].Name.ToString();

this.lnkFavoriteFunds.Text = this.financesDataSet.BankAccount[num].Balance.ToString();

break;

}

}

}


and my form_load code

private void frmMain_Load(object sender, EventArgs e)

{

refreshDatabase();

}


So, when I click on the lnkFavoriteAccount label, and my new row gets added, the app stops at the following line in my DataSet.Designer

[global:ystem.Diagnostics.DebuggerNonUserCodeAttribute()]

public byte FavoriteAccount {

get {

try {

return ((byte)(this[this.tableBankAccount.FavoriteAccountColumn]));

}

catch (global:ystem.InvalidCastException e) {
//Stops at the following line, this error was caused by 'if (this.financesDataSet.BankAccount[num].FavoriteAccount == 1)'

throw new global:ystem.Data.StrongTypingException("The value for column 'FavoriteAccount' in table 'BankAccount' is DBNull.", e);

}

}

set {

this[this.tableBankAccount.FavoriteAccountColumn] = value;

}

}


I have no idea what I am doing wrong, all of the code I used I retreived from Microsofts help documentation included with VS2008. I have tried used my TableAdapter.Insert() method and it still failed when it got to

if (this.financesDataSet.BankAccount[num].FavoriteAccount == 1)

in my refreshDatabase() method it still failed.

When I look, the data has been added into the database, it's just when I try to retreive it now, it bails on me. Am I retreiving the information wrong?

Thanks for any help you guys can offer.

Johnathon