web config - Problem when trying to configure enterprise library 5.0 (Data Access Application Block) -

Walk Diaaabi the Enterprise Library 5.0, I ran into some problems. I followed the steps according to the tutorial, but getting errors ...

1) download / install the enterprise library

2) References to the block I needed (generally add / data)

3) Import

  Import Microsoft.Practices.EnterpriseLibrary.Common import Microsoft.Practices.EnterpriseLibrary.Data   < P> 4) Enterprise library config software I open web.config from my site. Then I click on the blocks, then add data settings ... my Fill the selection and save / close  
 5) I then try to get an example of the database through (thinking is complete)   
 do not load could file or assembly: 
  dim database database = DatabaseFactory.CreateDatabase ()  
 
 6) I 'Microsoft.Practices.EnterpriseLibrary.Data as the compilation and the following error , Version = 5.0.414.0, culture = neutral, publicKeyToken = 31bf3856ad364e35 'or one of your dependencies. The apparent definition of the assembly located does not match the assembly reference. (Exception from HRESULT: 0x80131040) (C: \ Site \ web.config line 4) 
 
 My web.config was generated by the off-line 4 config tool is: 
 
  & lt; Section name = "dataConfiguration" type = "Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version = 5.0.414.0, Culture = neutral, PublicKeyToken = 31bf3856ad364e35" requirePermission = "true" / & Gt;  
 
 Am I missing a necessary step? Have I taken steps in the wrong order? I have made a mistake? 
 
 Thanks a lot for help.