I also have the same problem...

If you compare the start column in the screenshot at the start of this topic to the screenshot in the example you can see that the start date for the child tasks eg "Allocate Teams" is showing the date of the project not the date as entered in the child tasks table, it looks like all the child tasks are just showing the project start date.

Is there a way to show the child task start date in the start column as entered in the tasks table?

here is my code:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Infragistics.Win.UltraWinGanttView;
using Infragistics.Win.UltraWinSchedule;

namespace DataBinding_WinGanttView
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //  Call the method that creates a DataSet
            DataSet ds = this.GetSampleData();

            //  Set the BindingContextControl property to reference this form
            this.ultraCalendarInfo1.DataBindingsForTasks.BindingContextControl = this;
            this.ultraCalendarInfo1.DataBindingsForProjects.BindingContextControl = this;

            //  Set the DataBinding members for Projects
            this.ultraCalendarInfo1.DataBindingsForProjects.SetDataBinding(ds, "Projects");
            this.ultraCalendarInfo1.DataBindingsForProjects.IdMember = "ProjectID";
            this.ultraCalendarInfo1.DataBindingsForProjects.KeyMember = "ProjectKey";
            this.ultraCalendarInfo1.DataBindingsForProjects.NameMember = "ProjectName";
            this.ultraCalendarInfo1.DataBindingsForProjects.StartDateMember = "ProjectStartTime";

            //  Set the DataBinding members for Tasks
            this.ultraCalendarInfo1.DataBindingsForTasks.SetDataBinding(ds, "Tasks");

            // Basic Task properties
            this.ultraCalendarInfo1.DataBindingsForTasks.NameMember = "TaskName";
            this.ultraCalendarInfo1.DataBindingsForTasks.DurationMember = "TaskDuration";
            this.ultraCalendarInfo1.DataBindingsForTasks.StartDateTimeMember = "TaskStartTime";
            this.ultraCalendarInfo1.DataBindingsForTasks.IdMember = "TaskID";
            this.ultraCalendarInfo1.DataBindingsForTasks.ProjectKeyMember = "ProjectKey";
            this.ultraCalendarInfo1.DataBindingsForTasks.ParentTaskIdMember = "ParentTaskID";


            this.ultraCalendarInfo1.DataBindingsForTasks.PercentCompleteMember = "TaskPercentComplete";
            // All other properties
            this.ultraCalendarInfo1.DataBindingsForTasks.AllPropertiesMember = "AllProperties";

            //  Since we are showing a task that belongs to an explicitly defined
            //  project (i.e., not the UnassignedProject), assign that project to
            //  the control's Project property so the control knows to display that project.
            this.ganntView1.CalendarInfo = this.ultraCalendarInfo1;
            this.ganntView1.Project = this.ganntView1.CalendarInfo.Projects[1];

        }

        private DataSet GetSampleData()
        {
            DataSet theDataSet = new DataSet();
            //string projectKey = rm.GetString("projectKey");
            string projectKey = "projectKey";
            DataTable theProjects = theDataSet.Tables.Add("Projects");
            theProjects.Columns.Add("ProjectID");
            theProjects.Columns.Add("ProjectKey");
            theProjects.Columns.Add("ProjectName");
            theProjects.Columns.Add("ProjectStartTime", typeof(DateTime));
            // Assign values for each Project member
            theProjects.Rows.Add(new Object[] { Guid.NewGuid(), projectKey, "QuarterlyProject", DateTime.Today });

            DataTable theTasks = theDataSet.Tables.Add("Tasks");
            theTasks.Columns.Add("TaskID");
            theTasks.Columns.Add("ProjectKey");
            theTasks.Columns.Add("TaskName");
            theTasks.Columns.Add("TaskStartTime", typeof(DateTime));
            theTasks.Columns.Add("TaskDuration", typeof(TimeSpan));
            theTasks.Columns.Add("ParentTaskID");
            theTasks.Columns.Add("TaskPercentComplete");
            //The Task properties are all covered by individual members. But we could save space in the database
            //By storing data as binary using AllProperties and not binding the other fields.
            theTasks.Columns.Add("AllProperties", typeof(Byte[]));


            Guid planningTaskid = Guid.NewGuid();
            // Assign values for each Task member
            // Parent Task1
            theTasks.Rows.Add(new Object[] { planningTaskid, projectKey, "Planning", DateTime.Now, TimeSpan.FromDays(5), null, null });
            // Child Task1 of Parent Task1
            theTasks.Rows.Add(new Object[] { Guid.NewGuid(), projectKey, "Prepare Budget", DateTime.Now, TimeSpan.FromDays(2), planningTaskid, 100 });
            // Child Task2 of Parent Task1
            theTasks.Rows.Add(new Object[] { Guid.NewGuid(), projectKey, "Allocate Teams", DateTime.Now.AddDays(2), TimeSpan.FromDays(3), planningTaskid, null });

            // Parent Task2
            Guid implementationTaskid = Guid.NewGuid();
            theTasks.Rows.Add(new Object[] { implementationTaskid, projectKey, "Implementation", DateTime.Now.AddDays(6), TimeSpan.FromDays(16), null, null });

            // Child Task1 of Parent Task2
            Guid installationTaskid2 = Guid.NewGuid();
            theTasks.Rows.Add(new Object[] { installationTaskid2, projectKey, "Installations", DateTime.Now.AddDays(6), TimeSpan.FromDays(2), implementationTaskid, 60 });
            // Child Task2 of Parent Task2
            theTasks.Rows.Add(new Object[] { Guid.NewGuid(), projectKey, "Execution", DateTime.Now.AddDays(8), TimeSpan.FromDays(13), implementationTaskid, null });

            Guid testingTaskid = Guid.NewGuid();
            // Parent Task3
            theTasks.Rows.Add(new Object[] { testingTaskid, projectKey, "Testing", DateTime.Now.AddDays(23), TimeSpan.FromDays(20), null, null });

            // Child Task1 of Parent Task3
            theTasks.Rows.Add(new Object[] { Guid.NewGuid(), projectKey, "TestPhase1", DateTime.Now.AddDays(23), TimeSpan.FromDays(10), testingTaskid, 20 });
            // Child Task2 of Parent Task3
            theTasks.Rows.Add(new Object[] { Guid.NewGuid(), projectKey, "TestPhase2", DateTime.Now.AddDays(36), TimeSpan.FromDays(9), testingTaskid, null });

            return theDataSet;
        }

    }
}

in the code child task start time should not equal Parent task start time,but result is they are equal...