Hi, Since one extra parameters was added to the plugin lambda my hmt code does no update when I refresh the page. As my code is in hierarchical modules , I tried the hack of changing System.Plugin.Make.build but to no sucess. Maybe am I missing something? {-# LANGUAGE CPP, TemplateHaskell,NoOverloadedStrings #-} module Main where import Control.Monad(msum) import Happstack.Server import Control.Monad.IO.Class(liftIO) import qualified Page as P import qualified Handler as H #define DESENVOLVIMENTO --plugins #ifdef DESENVOLVIMENTO import Happstack.Server.Plugins.Dynamic #else import Happstack.Server.Plugins.Static #endif main = do dev <- initPlugins simpleHTTP nullConf $ do decodeBody (defaultBodyPolicy "/tmp/" 106496 106496 106496) msum [ $(withServerPart 'H.user) dev devHandler , dir "book" $ $(withServerPart 'H.book) dev devHandler } where devHandler = (\ _ handler -> handler)