diff -r 657f875b013e -r 73ea206103e6 userlibandfileserver/fileserver/sfile/sf_plugin_ops.cpp
--- a/userlibandfileserver/fileserver/sfile/sf_plugin_ops.cpp	Fri Jun 11 15:02:23 2010 +0300
+++ b/userlibandfileserver/fileserver/sfile/sf_plugin_ops.cpp	Wed Jun 23 19:44:53 2010 +0300
@@ -252,8 +252,11 @@
 	CFsPlugin* plugin=NULL;
 	FsPluginManager::LockChain();
 	TInt err = FsPluginManager::Plugin(plugin, aRequest->Message().Int2());
-	if(err != KErrNone)
+	if(err != KErrNone) //should be ok but just in case
+	    {
+	    FsPluginManager::UnlockChain();
 		return err;
+	    }
 
 	TInt r = KErrNotFound;
 	if(plugin)