Dim AppFile As String = "\Program Files\CF_RDA\CF_RDA.exe"
Dim myDomain As AppDomain = AppDomain.CreateDomain("MyApp", Nothing)
Try
myDomain.ExecuteAssembly(AppFile)
Catch ex As System.IO.FileNotFoundException
MessageBox.Show("Cannot execute" + Constants.vbCrLf + AppFile +
Constants.vbCrLf + ex.Message)
End Try

it always show me "Cannot execue" for FileNotFoundException,but the file is
really exists