FileNotFoundException was unhandled - HELP! file does exist.

Don't know why I am getting this error:

FileNotFoundException was unhandled

    Private Sub cmbTime_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmbTime.SelectedIndexChanged

        Dim folder As String = "C:\Projects\Darryl\Queue Review Files\" & DateTime.ParseExact(cmbDate.SelectedItem.ToString, "MMMM d, yyyy", Nothing).ToString("M-d") & "\Cam {0}\" & cmbTime.Text

        For i As Integer = 1 To 8

            Dim pcb As PictureBox = ApplicationControls.FindControl(Me, "pcbCam" & i)

            If Not pcb Is Nothing Then
                pcb.Image = Image.FromFile(String.Format(folder, i)) <<<<<<<<<<
            End If

        Next i

    End Sub