reading/writing a boolean bit with stream writer.

This is a pretty basic issue but for some reason i just can't read a boolean value from a binary file.
Here's the code i'm using

Imports System.IO
Public Class Form1
    Structure userdata
        Dim ispass As Boolean
        Dim password1 As String
        Dim password2 As String
    End Structure
    Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
        Dim setpass As userdata
        Dim mybinwrite As New BinaryWriter(File.Open("myset.bin", FileMode.OpenOrCreate, FileAccess.ReadWrite))

        setpass.ispass = 1
        setpass.password1 = TextBox1.Text
        setpass.password2 = TextBox2.Text

        mybinwrite.Write(setpass.ispass)
        mybinwrite.Write(setpass.password1)
        mybinwrite.Write(setpass.password2)
        mybinwrite.Close()

    End Sub

    Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click
        Dim mybinread As New BinaryReader(File.Open("myset.bin", FileMode.Open, FileAccess.Read))
        Dim readpass As userdata

        readpass.ispass = mybinread.ReadBoolean
        mybinread.Close()
        If readpass.ispass = 1 Then
            MsgBox("wahooooooo")
        End If
        If readpass.ispass = 0 Then
            MsgBox("enter password")
        End If

    End Sub
End Class

if i look at the file it displays the two words in the password feilds but no 1 or 0.