Generate A "internal Compile Error" In VB 2010 Beta 2?

This piece of code generate a "internal compile error" in VB 2010 beta 2. Is the begin of a ODBC program test using a MySQL database. Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim conn As ADODB.Connection = New ADODB.Connection("DRIVER={MySQL ODBC 5.1 Driver};" &
"SERVER=localhost;" &
" DATABASE=dbmysql1;" &
"UID=root;PWD=ranger; OPTION=3")
End Sub
End Class