how to select records from two dates in vb.net?

i am having table in ms access named as stockitems, table structure is..

stdate     stitems
01-04-2015   Red
02-04-2015   Blue
08-04-2015   Green
01-05-2015   Grey
02-05-2015   Violet
09-05-2015   Purple
04-06-2015   Sky Blue

i am using the below code to select records from that table...

Dim report As New CrystalDecisions.CrystalReports.Engine.ReportDocument
    Dim xs, xs2, cmp As String
    xs = date1.Text
    xs2 = date2.Text
    cmp = salsqkrpt.salcom.Text
    Dim cmd1 As OleDbCommand = New OleDbCommand("SELECT * from stockitems  where stdate    between '" & date1.Text & "'and '" & date2.Text & "'",con)
    myDA = New OleDbDataAdapter(cmd1)
    myDataSet = New DataSet()
    myDA.Fill(myDataSet, "stockitems ")
    report.Load(Application.StartupPath & "\stockreport.rpt")
    report.SetDataSource(myDataSet.Tables("stockitems "))
    stckreport.CrystalReportViewer1.ReportSource = report

here date1 and date2 was masked textbox ,mask is 00-00-0000 (DD-MM-YYYY) when excuting this code the report only get from first two strings only that is dd only,when i assign date1=01-04-2015 and date2=03-05-2015 the result comes like...

      stdate     stitems
    01-04-2015   Red
    02-04-2015   Blue
    01-05-2015   Grey
    02-05-2015   Violet

  but my expected result is 

    stdate     stitems
    01-04-2015   Red
    02-04-2015   Blue
    08-04-2015   Green
    01-05-2015   Grey
    02-05-2015   Violet

it does'nt works as a date please help me out of this problem developers. thanks in advance.