Someone

System.TypeInitializationException: The type initializer for "Mono.WebServer.XSPWorkerRequ
est" threw an exception. ---> System.DllNotFoundException: Unable to load DLL (aspnet_isap
i.dll).
   at System.Web.UnsafeNativeMethods.DirMonOpen(String dir, Boolean watchSubtree, UInt32 n
otifyFilter, NativeFileChangeNotification callback, IntPtr& pCompletion)
   at System.Web.DirMonCompletion..ctor(DirectoryMonitor dirMon, String dir, Boolean watch
Subtree, UInt32 notifyFilter)
   at System.Web.DirectoryMonitor.StartMonitoring()
   at System.Web.DirectoryMonitor.StartMonitoringFile(String file, FileChangeEventHandler
callback, String alias)
   at System.Web.FileChangesMonitor.StartMonitoringFile(String alias, FileChangeEventHandl
er callback)
   at System.Web.Configuration.HttpConfigurationSystem.AddFileDependency(String file)
   at System.Web.Configuration.HttpConfigurationSystem.ComposeConfig(String reqPath, IHttp
MapPath configmap)
   at System.Web.Configuration.HttpConfigurationSystem.GetComplete()
   at System.Web.Configuration.HttpConfigurationSystemBase.System.Configuration.IConfigura
tionSystem.GetConfig(String configKey)
   at System.Configuration.ConfigurationSettings.GetConfig(String sectionName)
   at System.Configuration.ConfigurationSettings.get_AppSettings()
   at Mono.WebServer.XSPWorkerRequest..cctor()
   --- End of inner exception stack trace ---

Server stack trace:
   at Mono.WebServer.XSPWorkerRequest..ctor(Int32 requestId, XSPRequestBroker requestBroke
r, IApplicationHost appHost, EndPoint localEP, EndPoint remoteEP, String verb, String path
, String queryString, String protocol, Byte[] inputBuffer, IntPtr socket, Boolean secure)
   at Mono.WebServer.XSPApplicationHost.ProcessRequest(Int32 reqId, Int64 localEPAddr, Int
32 localEPPort, Int64 remoteEPAdds, Int32 remoteEPPort, String verb, String path, String q
ueryString, String protocol, Byte[] inputBuffer, String redirect, IntPtr socket, SslInform
ations ssl)
   at System.Runtime.Remoting.Messaging.StackBuilderSink.PrivateProcessMessage(MethodBase
mb, Object[] args, Object server, Int32 methodPtr, Boolean fExecuteInContext, Object[]& ou
tArgs)
   at System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg,
Int32 methodPtr, Boolean fExecuteInContext)

Exception rethrown at [0]:
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMess
age retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32
type)
   at Mono.WebServer.XSPApplicationHost.ProcessRequest(Int32 reqId, Int64 localEPAddr, Int
32 localEPPort, Int64 remoteEPAdds, Int32 remoteEPPort, String verb, String path, String q
ueryString, String protocol, Byte[] inputBuffer, String redirect, IntPtr socket, SslInform
ations ssl)
   at Mono.WebServer.XSPWorker.RunInternal(Object state)