title: Can't connect to database when install DNN 6.0.1
body: <p>I have downloaded DNN 6.0.1 to install on my localhost. The environment is Win7+IIS7.5+SQL 2008 Express. I have add modify permission for NETWORK SERVICE on the folder. When I use the DefaultAppPool(.NET framework 4.0), the website doesn't work, while using ASP.NET v2.0 classic, the website works but when setting up database in stallation, there goes:</p>
  
  <p>Connection Error(s):
  Index #: 0
  Source: .Net SqlClient Data Provider
  Class: 13
  Number: 18456
  Message:
  the Message item is blank.</p>
  
  <p>So anybody know why and how solve this problem?</p>
  
  <p>Thank,
  Sean</p>