Help with Random Number Guessing Game Timer and Image Display.

I am creating a random number guessing game. I have 6 options. 3 Game playing levels and 3 timer levels.

I have my form display with 6 radio buttons:
radRookie
radVeteran
radPro

radThirty
radFourtyFive
radSixty

You select your level and time.

Then you have a text box to enter your guess, then click guess.

I want to display an image above or below the text box to guess higher or guess lower.
I can get the images hidden until button click, but only one image displays and doesn't work properly.

I also cannot get the darn timer to work and count down while guessing. Any help please!?!

Public Class Form1

    Dim intGuess As Integer
    Dim aRandom As New Random
    Dim holdNumber As Integer
    Dim timercount As Integer

    Private Sub radRookie_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles radRookie.CheckedChanged
        holdNumber = aRandom.Next(0, 10)
    End Sub

    Private Sub radVeteran_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles radVeteran.CheckedChanged
        holdNumber = aRandom.Next(0, 100)
    End Sub

    Private Sub radPro_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles radPro.CheckedChanged
        holdNumber = aRandom.Next(0, 1000)
    End Sub

    Private Sub btnGuess_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnGuess.Click

        If Integer.TryParse(txtNumber.Text, intGuess) Then
            If intGuess > -1 Then
                If radRookie.Checked = True Then
                    If txtNumber.Text = holdNumber Then
                        imgHigher.Visible = False
                        imgLower.Visible = False
                        MessageBox.Show("You Win! The Number was " & holdNumber)
                    ElseIf txtNumber.Text < holdNumber Then
                        imgHigher.Visible = True
                    ElseIf txtNumber.Text > holdNumber Then
                        imgHigher.Visible = True
                    End If


                ElseIf radVeteran.Checked = True Then
                    If txtNumber.Text = holdNumber Then
                        imgHigher.Visible = False
                        imgLower.Visible = False
                        MessageBox.Show("You Win! The Number was " & holdNumber)
                    ElseIf txtNumber.Text < holdNumber Then
                        imgHigher.Visible = True
                    ElseIf txtNumber.Text > holdNumber Then
                        imgHigher.Visible = True
                    End If


                ElseIf radPro.Checked = True Then
                    If txtNumber.Text = holdNumber Then
                        imgHigher.Visible = False
                        imgLower.Visible = False
                        MessageBox.Show("You Win! The Number was " & holdNumber)
                    ElseIf txtNumber.Text < holdNumber Then
                        imgHigher.Visible = True
                    ElseIf txtNumber.Text > holdNumber Then
                        imgHigher.Visible = True
                    End If
                End If
            Else
                MessageBox.Show("Must enter a Valid Guess!")
            End If
        End If
    End Sub


    Private Sub btnClear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClear.Click

        radRookie.Checked = False
        radVeteran.Checked = False
        radPro.Checked = False

        radThirty.Checked = False
        radFourtyFive.Checked = False
        radSixty.Checked = False

        lblTimeRemain.Text = String.Empty

        txtNumber.Clear()

    End Sub

    Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
        Me.Close()
    End Sub

    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        If radThirty.Checked = True Then
            Timer1.Interval = 1000
            Timer1.Enabled = True
            timercount = 30
            lblTimeRemain.Text = timercount.ToString()
            If timercount = 0 Then
                Timer1.Enabled = False
                lblTimeRemain.Text = "Done"

            Else
                timercount -= 1
            End If
        ElseIf radFourtyFive.Checked = True Then
            Timer1.Interval = 1000
            Timer1.Enabled = True
            timercount = 45
            lblTimeRemain.Text = timercount.ToString()
            If timercount = 0 Then
                Timer1.Enabled = False
                lblTimeRemain.Text = "Done"

            Else
                timercount -= 1
            End If
        ElseIf radSixty.Checked = True Then
            Timer1.Interval = 1000
            Timer1.Enabled = True
            timercount = 60
            lblTimeRemain.Text = timercount.ToString()
            If timercount = 0 Then
                Timer1.Enabled = False
                lblTimeRemain.Text = "Done"

            Else
                timercount -= 1
            End If

        End If
    End Sub
End Class

Attached is my gui