I get error when publish page after adding InheritPageModelBuilder to Render Page Content (TBB).

<CompoundTemplate xmlns="http://www.tridion.com/ContentManager/5.3/CompoundTemplate">

10 DefaultModelBuilder;DefaultPageMetaModelBuilder;EclModelBuilder;ContextExpressionsModelBuilder;InheritPageModelBuilder

Could not load type 'Sdl.Web.Tridion.Data.InheritMetadataPageModelBuilder' from assembly 'Sdl.Web.Tridion.Templates.merged, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null'.

What can I do?