primera vez estoy insertando desde ASP.NET/C# y tengo un pequeño problema. Sigo recibiendo el siguiente error cada vez que se ejecuta este código: "ExecuteNonQuery: la propiedad CommandText no se ha inicializado" ¿Alguien sabe qué significa esto y cómo lo soluciono?

¡Gracias por adelantado

string sqlQuery = "INSERT INTO ATI_LOG_IO (Date, Connect_Time, Disconnect_Time, ATI_Rep, Reason_For_Access, Property_Contact, Case_Number, Comments, Property_ID)";
sqlQuery += "VALUES (@Today, @Connect, @Disconnect, @Rep, @Reason, @Contact, @CaseNum, @Comments, @PropertyID)";
using (SqlConnection dataConnection = new SqlConnection(connectionString))
{
    using (SqlCommand dataCommand = dataConnection.CreateCommand())
    {
        dataConnection.Open();
        dataCommand.CommandType = CommandType.Text;
        dataCommand.CommandText = sqlQuery;
        dataCommand.Parameters.Add("@Today", DateTime.Today.ToString());
        dataCommand.Parameters.Add("@Connect", txtInDate.Text + " " + fromHrs.Text + ":" + fromMins.Text + ":00");
        dataCommand.Parameters.Add("@Disconnect", txtOutdate.Text + " " + toHrs.Text + ":" + fromMins.Text + ":00");
        dataCommand.Parameters.Add("@Rep", repID);
        dataCommand.Parameters.Add("@Reason", txtReason.Text);
        dataCommand.Parameters.Add("@Contact", txtContact.Text);
        dataCommand.Parameters.Add("@CaseNum", txtCaseNum.Text);
        dataCommand.Parameters.Add("@Comments", txtComments.Text);
        dataCommand.Parameters.Add("@PropertyID", lstProperties.SelectedValue);
        dataCommand.ExecuteNonQuery();
        dataConnection.Close();
    }
}