if i insert the new studadmin and the admincard and it Successfully Register but when i look at the access it not go the correct row is go to the timein and timeout

i not sure which part wrong:

Private Sub btnRegister_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRegister.Click
        If String.IsNullOrWhiteSpace(txtcard.Text) Or String.IsNullOrWhiteSpace(txtadmno.Text) Then
            MessageBox.Show("Please complete the on the box.", "Authentication Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
            Exit Sub
        End If

        Dim Conn As System.Data.OleDb.OleDbConnection
        Dim ConnectionString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\temp\Database1.accdb"
        Conn = New System.Data.OleDb.OleDbConnection(ConnectionString)


        Try
            If Conn.State = ConnectionState.Open Then Conn.Close()
            Conn.Open()

            Dim CMD As New System.Data.OleDb.OleDbCommand
            CMD.CommandText = "Select FROM tbl_studentadm WHERE [Stud Admin] ='" & txtadmno.Text & "' AND [Admin Card] = '" & txtcard.Text & "'"
            Dim sql As String = "insert into tbl_studentadm ([Stud Admin], [Admin Card]) values('" & txtadmno.Text & "', '" & txtcard.Text & "')"
            Dim sqlCom As New System.Data.OleDb.OleDbCommand(sql, Conn)
            sqlCom.Connection = Conn

            Dim result As Integer = sqlCom.ExecuteNonQuery()

            sqlCom.Dispose()
            Conn.Close()

            If result > 0 Then
                MessageBox.Show("Successfully Register.")
            Else
                MessageBox.Show("Failure to Register.")

            End If
            txtadmno.Text = ""
            txtcard.Text = ""
            txtadmno.Focus()

            Lecturer_Form.Show()
        Catch ex As Exception
            MessageBox.Show("Failed to connect to Database..", "Database Connection Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
        End Try

    End Sub


    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick

        lbltime.Text = "Time:" + TimeString

        If String.IsNullOrWhiteSpace(txtadmno.Text) Or String.IsNullOrWhiteSpace(txtcard.Text) Then
            'MessageBox.Show("Please complete the on the box.", "Authentication Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
            Exit Sub
        End If

        Using conn As New System.Data.OleDb.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\temp\Database1.accdb")


            lbltime.Text = TimeOfDay.Hour & ":" & TimeOfDay.Minute & ":" & TimeOfDay.Second
            If TimeOfDay.Second < 10 Then
                Dim fitsecond As String
                fitsecond = TimeOfDay.Second
                lbltime.Text = TimeOfDay.Hour & ":" & TimeOfDay.Minute & ":" & "0" & fitsecond
            End If
            If TimeOfDay.Minute < 10 Then
                Dim fitminute As String
                fitminute = TimeOfDay.Minute
                lbltime.Text = TimeOfDay.Hour & ":" & "0" & fitminute & ":" & TimeOfDay.Second
            End If
            If TimeOfDay.Hour < 10 Then
                Dim fithour As String
                fithour = TimeOfDay.Hour
                lbltime.Text = "0" & fithour & ":" & TimeOfDay.Minute & ":" & TimeOfDay.Second
            End If

            Dim sql As String = "INSERT INTO tbl_studentadm (TimeIn, TimeOut) VALUES ('" & txtadmno.Text & "', '" & txtcard.Text & "')"
            Dim sqlCom As New System.Data.OleDb.OleDbCommand(sql, conn)
            sqlCom.Connection = conn
            conn.Open()

            Dim CMD As New System.Data.OleDb.OleDbCommand
            CMD.CommandText = "UPDATE tbl_StudentAdm SET [Stud Admin] = @StudAdmin WHERE TimeIn = @TimeIn"

            CMD.Parameters.AddWithValue("@StudAdmin", "Values")
            CMD.Parameters.AddWithValue("@TimeIn", "TimeOutValues")


            Dim result As Integer = sqlCom.ExecuteNonQuery()

            sqlCom.Dispose()
            conn.Close()

            If result > 0 Then
                ' MessageBox.Show("Insert time in.")
            Else
                MessageBox.Show("Failure to time in.")

            End If
        End Using

        'Catch ex As Exception
        'MessageBox.Show("Failed to connect to Database..", "Database Connection Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
        'End Try
    End Sub
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