How did you create your resx file?
A normal way to add a resource to a project is Menu Project/Properties - resource tab, add an existing file (in your case).
In your app folder there is My Project folder
There should be a Resources.Designer.vb file
Check if it exists and contains the following:
vb.net Code:
Namespace My.Resources
' Rest of code skipped
Friend ReadOnly Property iiii() As Byte()
Get
Dim obj As Object = ResourceManager.GetObject("iiii", resourceCulture)
Return CType(obj,Byte())
End Get
End Property
End Module
End Namespace