Image Resource Not Loading In PictureBox1?

I cannot seem to get my image resources to load into PictureBox1.I can see all the images I added as resources in the solution explorer.They are a series of PNG files with names associated with countries.I am at the beginning stages of randomly changing the image that is displayed in PictureBox1, but I cannot even get the first image to load.Here is my code so far. When I click on Button2 I can see that my array returns a random country, but no image loads.I even tried typing in several of the countries names as well as the country name followed by png (e.g. chine.png) and again no image loads.

Public Class Form1
Dim randomObject As New Random()
Dim Flags() As String = {"australia", "brazil", "china", "italy", "russia", "south africa", "spain"}[code]......