DataTables In SQLExpress Database Are Not Updating When Using Stored Procedures From Windows Application

I'm writing a Windows application (Visual Studio 2005, c#) utilizing a local SQLExpress database. It consists of about 10 tables and I've created about 15 Stored Procedures to address various functions... I can run the update Stored Procedures interactively within the designer and the data tables update as designed. However, if I run the update Stored Procedures from within my windows application is where they fail. I get no error messages, if I return a rowcount variable from the Stored Procedure it tells me that one row was updated (SELECT @RtnVal == @@rowcount)... but when I open the subject table in the designer, there is no new data.

My update queries address both insert and update functions, so if it is new row of data, it performs the insert action, otherwise it updates an existing row.

I can query the data using my stored procedures to load default values into my windows form, I can search and find client records to display in the form... I just can't update records. I'm of the opinion that it is a rights issue, but I can't find any resources that address user access accounts with SQLExpress and windows apps. The current connection string for my local database is set for Integrated Security = true; User Instance = true

I've tried two approaches... one utilizes my stored procedure....


bool bSave;
SqlConnection conn = new SqlConnection(KadaDesk.Properties.Settings.Default.dbKadaConnectionString.ToString());
SqlCommand cmd = new SqlCommand("SavAuthTesterData", conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("@CtrId", SqlDbType.NVarChar, 20).Value = TestCenterID.ToString();
cmd.Parameters.Add("@AT_Id", SqlDbType.NVarChar, 15).Value = GnuAuthTesterId.ToString();
cmd.Parameters.Add("@AT_Name", SqlDbType.NVarChar, 50).Value = GnuAuthTesterName.ToString();
cmd.Parameters.Add("@AT_Pwd", SqlDbType.NVarChar, 15).Value = GnuAuthTesterPwd.ToString();
cmd.Parameters.Add("@Maint", SqlDbType.NChar, 1).Value = GnuAuthTesterStatus.ToString();
cmd.Parameters.Add("@ModBy", SqlDbType.NVarChar, 15).Value = sAuthTester.ToString();
try
{
conn.Open();
cmd.ExecuteNonQuery();
bSave = true;
}

Then I tried a direct insert...

SqlConnection conn = new SqlConnection(KadaDesk.Properties.Settings.Default.dbKadaConnectionString.ToString());
SqlCommand cmd = new SqlCommand();
SqlTransaction myTrans;
conn.Open();
cmd.Connection = conn;
myTrans = conn.BeginTransaction();
cmd.Transaction = myTrans;
string disDte = DateTime.Now.ToShortDateString();
try
{
string sCmdText = "INSERT INTO Tester (CenterId, AuthTesterId, AuthTesterName, AuthTesterPwd, "
+ "CreateDte, Maint, ModBy) "
+ "VALUES ('" + TestCenterID.ToString() + "','"
+ GnuAuthTesterId.ToString() + "','"
+ GnuAuthTesterName.ToString() + "','"
+ GnuAuthTesterPwd.ToString() + "','"
+ disDte.ToString() + "','"
+ GnuAuthTesterStatus.ToString() + "','"
+ sAuthTester.ToString() + "')";
cmd.CommandText = sCmdText;
cmd.ExecuteNonQuery();
myTrans.Commit();
bSave = true;
}


Both fail... which points to the only common point in both approaches, the connection string and user rights... but I can't find any place to address user accounts or configurations for windows apps.

Thanks for whatever help you can offer...

Jim-