Help in Problem when Connect VB with Oracle 11g / for windows 64 bit

[Dorar]

My project is Housing reservation system for University

I design the interfaces by VB and connect to my oracle data base account

Oracle 11g, VB express edition are used

The proble is with the login form
http://im20.gulfup.com/2011-12-23/1324652639153.png
when I debug and enter the ID & password for User :

according to my code :

Imports Oracle.DataAccess.Client
Imports Oracle.DataAccess.Types

Public Class Login_Page
    Dim cn As OracleConnection
    Dim cmd As OracleCommand
    Private Sub Login_Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load


    End Sub

    Private Sub NameLabel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)

    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim cn As New OracleConnection
        Dim connString As String = "User Id=08120168;Password=8080;Data Source=dell"
        cn = New OracleConnection(connString)
        Dim ser = CInt(NameTextBox.Text)
        Dim pw = PasswordTextBox.Text
        cn.Open()
        

        cmd = New OracleCommand("SELECT * FROM LOGIN_STUDENT WHERE USER_ID like '%" & ser & "' AND PASSWORD like '%" & pw & "'", cn)

        Dim myreader As OracleDataReader = cmd.ExecuteReader()

        If (myreader.Read() = True) Then

            MessageBox.Show("The user is valid!")
            
            studentpage.Show()        

        Else

            MessageBox.Show("Invalid username or password!")

        End If

    End Sub

it suppose to connect and show the messege:The user is valid

but it does not and a 'FileNotFoundException was unhandled'window appears and running stop and hang
http://im20.gulfup.com/2011-12-23/1324652639151.png
** The same code had been tried in another computers which are 32 bit and work successfuly but in my computer(64 bit) not work.

** Is 32 bit or 64 bit affect ?
** What can i do to solve this problem?
** could any one help

[rubberman]

Can you access the database server from the 64-bit machine using sqlplus? If not, perhaps you have not properly installed the Oracle client tools/code on the 64-bit machine?

[Dorar]

I'm proberly installed the oracle code even the teacher make sure about it but still the problem in the path

pleaze any one can help
what to do

[rubberman]

It may be a Unicode issue in that what you think you are asking for, and what is really on the system are different - single-byte name vs. multi-byte Unicode name. Other than this possibility, I'm out of ideas... :-(

[dspnhn]

see this link
http://www.daniweb.com/software-development/vbnet/threads/26939

further more try and use ODBC to connect with database. eg

Oracle ODBC Connection String
Driver={Microsoft ODBC for Oracle};Server=myservername;Uid=myusername;Pwd=mypassword;

Oracle OLEDB Connection String
Provider=msdaora;Data Source=mydemodb;User Id=myusername;Password=mypasswd;

Oracle .Net Connection String
Data Source=mydemodb;User Id=myusername;Password=mypasswd;Integrated Security=no;

hope this helps.