I download the source package and compile it successfully. if I use that for new install it work correctly but if I  use it to upgrade prevues version throw bellow error, is there any special process for this scenario? if I download the upgrade from codeplex it work but my build dosn't work. :(

Compiler Error Message: CS1705: Assembly 'DotNetNuke, Version=7.0.6.121, Culture=neutral, PublicKeyToken=null' uses 'Telerik.Web.UI, Version=2013.1.403.40, Culture=neutral, PublicKeyToken=121fae78165ba3d4' which has a higher version than referenced assembly 'Telerik.Web.UI, Version=2013.1.220.40, Culture=neutral, PublicKeyToken=121fae78165ba3d4'

hi dear sebastian

thanks for your reply.
if download the upgrade package from codeplex and reflected it, in dotpeek see that telerik referense version is 2013.1.403.40 that is latest version that comes with dnn 7.0.6
if I compile dnn with telerik 2013.1.220.40 it work just with dnn 7.0.5 therefore if I try to upgrade a version for example 7.0.0 that use older version of telerik, I see the error.

binding is same as original version.
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Telerik.Web.UI" publicKeyToken="121fae78165ba3d4" />
        <bindingRedirect oldVersion="2008.0.0.0-2020.0.0.0" newVersion="2013.1.220.40" />
      </dependentAssembly>
    </assemblyBinding>

according to the binding version  403 must bind to version 220, but it seems that assembly binding doesn't affected.