diff --git a/Makefile.am b/Makefile.am
index d6cea4d..6a9f99c 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -181,6 +181,8 @@ src_backend_libbackend_la_SOURCES = \
 		src/backend/schedulable.cc \
 		src/backend/scheduler.cc \
 		src/backend/serialize_visitor.cc \
+		src/backend/serializer.cc \
+		src/backend/serializer_error.cc \
 		src/backend/serializers_gatekeeper.cc \
 		src/backend/simulation.cc \
 		src/backend/static_process.cc \
@@ -223,6 +225,8 @@ pkginclude_HEADERS += \
 		src/backend/schedulable.hh \
 		src/backend/scheduler.hh \
 		src/backend/serialize_visitor.hh \
+		src/backend/serializer.hh \
+		src/backend/serializer_error.hh \
 		src/backend/serializers_gatekeeper.hh \
 		src/backend/simulation.hh \
 		src/backend/sub_request.hh \
diff --git a/src/backend/module.cc b/src/backend/module.cc
index 7c93f50..bb53e50 100644
--- a/src/backend/module.cc
+++ b/src/backend/module.cc
@@ -35,6 +35,8 @@ Module::Module(const Glib::ustring& identifier) throw(InvalidPluginException) :
   get_author_ptr(NULL),
   get_version_ptr(NULL)
 { 
+  if(!*this) throw InvalidPluginException(Module::get_last_error());
+
   // Type-safeness here is an optional, as always. :-)
   std::string prefix = "sgpem__Plugin__";
   if(!(get_symbol(prefix + "on_init",     (void*&) on_init_ptr) && 
diff --git a/src/backend/plugin_manager.cc b/src/backend/plugin_manager.cc
index c7b79ec..834e877 100644
--- a/src/backend/plugin_manager.cc
+++ b/src/backend/plugin_manager.cc
@@ -70,23 +70,13 @@ PluginManager::rescan_dirs()
       {
 	std::string module_path = Module::build_path(*it, *dir_it);
 
-	std::cout << "Attempting to load module at path " << module_path << std::endl;
+	std::cerr << "Attempting to load module at path " << module_path << std::endl;
 	
 	try
 	{
 	  module = new Module(module_path);
-
-	  if(*module) 
-	  {
-	    _modules.push_back(module);
-	    std::cerr << "\tSuccess" << std::endl;
-	  }
-	  else 
-	  { 
-	    std::cerr << "\tFailed: " << Glib::Module::get_last_error() << std::endl;
-	    delete module;
-	  }
-
+          _modules.push_back(module);
+	  std::cerr << "\tSuccess" << std::endl;
 	}
 	catch(InvalidPluginException e)
 	{
diff --git a/src/backend/serialize_visitor.hh b/src/backend/serialize_visitor.hh
index 02f4a54..23380cf 100644
--- a/src/backend/serialize_visitor.hh
+++ b/src/backend/serialize_visitor.hh
@@ -48,7 +48,7 @@ namespace sgpem
     This class is a virtual class and each method must be reimplemented
     in derived classes to have effective serialization.
    */
-  class SerializeVisitor
+  class SG_DLLEXPORT SerializeVisitor
   {
   public:
     virtual ~SerializeVisitor() = 0;
diff --git a/src/backend/serializer.cc b/src/backend/serializer.cc
index 82037b3..656b487 100644
--- a/src/backend/serializer.cc
+++ b/src/backend/serializer.cc
@@ -20,6 +20,8 @@
 
 #include "serializer.hh"
 
+#include "serializers_gatekeeper.hh"
+
 using namespace sgpem;
 
 Serializer::Serializer()
diff --git a/src/backend/serializer.hh b/src/backend/serializer.hh
index be97132..96356c3 100644
--- a/src/backend/serializer.hh
+++ b/src/backend/serializer.hh
@@ -31,7 +31,7 @@ namespace sgpem
 {
   class Serializer;
 
-  class Serializer
+  class SG_DLLEXPORT Serializer
   {
   public:
     Serializer();  
diff --git a/src/backend/serializer_error.hh b/src/backend/serializer_error.hh
index 9dc4cfe..63824d9 100644
--- a/src/backend/serializer_error.hh
+++ b/src/backend/serializer_error.hh
@@ -27,7 +27,7 @@
 
 namespace sgpem
 {
-  class SerializerError : public std::runtime_error
+  class SG_DLLEXPORT SerializerError : public std::runtime_error
   {
   public:
     SerializerError(const std::string& what);