Error SPI.dataobjects.PersistenceCapable

[S]

Error1 The type 'Telerik.OpenAccess.SPI.dataobjects.PersistenceCapable' is defined in an assembly that is not referenced. You must add a reference to assembly 'Telerik.OpenAccess, Version=2015.1.225.1, Culture=neutral, PublicKeyToken=7ce17eeaf1d59342'.....Controller.cs7117CRMS

I added the reference to the web config .. I still got the error from above. Any thing I can do to solve this

here is what my web config looks like

<compilation debug="true" targetFramework="4.5" >
    <assemblies>
      <add assembly="Telerik.OpenAccess, Version=2015.1.225.1, Culture=neutral, PublicKeyToken=7ce17eeaf1d59342"/>
    </assemblies>
  </compilation>

Actually, I created another project to do the data manipulation. I then add a reference to my MVC project.

 

Thank You.