Application Packaging Problem

After installing on a clean machine that doesn't have a copy of VB, and on attempting to run the wizard created packaged application, I get the error message "Unable to open database".

If I install on a machine which has a copy of VB it runs fine with errors.

Below is the code which generates the error-

Code:

---

Sub Main()

    On Error GoTo Err_Main

    ' Assumming  'MDB' will be kept in the same folder
    ' as the 'EXE' file, save the app path in a global variable.
    '
    g_sDataPath = App.Path & "\sfdatafirst.mdb"

    ' Establish a global database connection that can be used
    ' throughout your application for creating recordsets.
    '
    g_DB.ConnectionString = "Data Source=" & g_sDataPath
    g_DB.Provider = "Microsoft.Jet.OLEDB.3.51"
    g_DB.CursorLocation = adUseServer
    g_DB.Open

    ' Open the startup form of your application.
    '
    frmLogin.Show
    Exit Sub

Err_Main:
    MsgBox "Unable to open database.", vbCritical, "See Administrator"
    End

End Sub

---

Any ideas?