diff --git a/server/2015Remote/IOCPServer.cpp b/server/2015Remote/IOCPServer.cpp
index 2e3eb2a..4c56bea 100644
--- a/server/2015Remote/IOCPServer.cpp
+++ b/server/2015Remote/IOCPServer.cpp
@@ -3,6 +3,7 @@
 #include "2015Remote.h"
 
 #include <iostream>
+
 #if USING_ZLIB
 #include "zlib.h"
 #define Z_FAILED(p) (Z_OK != (p))
@@ -113,6 +114,7 @@ IOCPServer::~IOCPServer(void)
 	{
 		CONTEXT_OBJECT *ContextObject = m_ContextConnectionList.GetHead();
 		RemoveStaleContext(ContextObject);
+		SAFE_DELETE(ContextObject->olps);
 	}
 
 	while (!m_ContextFreePoolList.IsEmpty())
diff --git a/server/2015Remote/IOCPServer.h b/server/2015Remote/IOCPServer.h
index b2fd83c..b5a0630 100644
--- a/server/2015Remote/IOCPServer.h
+++ b/server/2015Remote/IOCPServer.h
@@ -138,6 +138,7 @@ protected:
 	CRITICAL_SECTION*	m_cs;
 };
 
+#define TRACK_OVERLAPPEDPLUS 0
 
 class OVERLAPPEDPLUS   
 {
@@ -148,9 +149,9 @@ public:
 
 	OVERLAPPEDPLUS(IOType ioType)
 	{
-#if 0
+#if TRACK_OVERLAPPEDPLUS
 		char szLog[100];
-		sprintf_s(szLog, "=> [new] OVERLAPPEDPLUS %x by thread [%d].\n", this, GetCurrentThreadId());
+		sprintf_s(szLog, "=> [new] OVERLAPPEDPLUS %p by thread [%d].\n", this, GetCurrentThreadId());
 		OutputDebugStringA(szLog);
 #endif
 		ZeroMemory(this, sizeof(OVERLAPPEDPLUS));
@@ -159,9 +160,9 @@ public:
 
 	~OVERLAPPEDPLUS()
 	{
-#if 0
+#if TRACK_OVERLAPPEDPLUS
 		char szLog[100];
-		sprintf_s(szLog, "=> [delete] OVERLAPPEDPLUS %x by thread [%d].\n", this, GetCurrentThreadId());
+		sprintf_s(szLog, "=> [delete] OVERLAPPEDPLUS %p by thread [%d].\n", this, GetCurrentThreadId());
 		OutputDebugStringA(szLog);
 #endif
 	}
diff --git a/server/2015Remote/stdafx.h b/server/2015Remote/stdafx.h
index 633ef72..46ecc37 100644
--- a/server/2015Remote/stdafx.h
+++ b/server/2015Remote/stdafx.h
@@ -38,6 +38,12 @@
 // VS2017以前版本的VLD: https://kinddragon.github.io/vld
 // VS2019使用的VLD（支持以往的VS版本, 推荐）: https://github.com/oneiric/vld/releases/tag/v2.7.0
 // 如果要将受控端程序放到其他机器上面运行, 请使用Release模式生成的程序, 以解除对VLD的依赖; 否则你需要将VLD相关文件一同拷贝.
+// 对于VLD提示内容泄露，但是追踪不了函数调用堆栈的情况，请启用使用符号服务器自动下载。这可能引起调试程序的时候变慢。
+// 确保你的调试工具（如 Visual Studio 或 WinDbg）配置了符号服务器。
+// 符号服务器会自动下载缺失的符号文件，包括 dbghelp.pdb，并将其缓存到本地符号路径。
+// 配置符号服务器（以 Visual Studio 为例）：在 Visual Studio 中，打开 调试 > 选项 > 符号。
+// 勾选 Microsoft Symbol Servers. 指定符号缓存目录，例如 "C:\Symbols"。
+// 调试时，缺失的符号（如 dbghelp.pdb）会自动下载到缓存目录。
 #include "vld.h"
 
 #include "targetver.h"