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e-Business 5.5.1 uses the Telerik.Web.UI assembly version 20142013.21.618403.40. If you receive an error that the server could not find an earlier version of the Telerik.Web.UI assembly, add the following assemblyBinding to the web.config's runtime section.
No Format nopanel true <assemblyBinding xmlns="urn:schemas‐microsoft‐com:asm.v1"> <dependentAssembly> <assemblyIdentity name="Telerik.Web.UI" publicKeyToken="121FAE78165BA3D4" culture="neutral"/> <bindingRedirect oldVersion="2009.2.701.35" newVersion="2013.1.403.40"/> </dependentAssembly> </assemblyBinding>