diff --git a/sane/scanner.cpp b/sane/scanner.cpp
index 90df8ae..e83802f 100644
--- a/sane/scanner.cpp
+++ b/sane/scanner.cpp
@@ -357,17 +357,52 @@ namespace callback
 	void (*twain_ui_free)(void* buf) = NULL;
 
 
+	static int load_dll(const char* path_dll, HMODULE* dll)
+	{
+		HMODULE h = LoadLibraryA(path_dll);
+		int		ret = GetLastError();
+		char	info[128] = { 0 };
+
+		sprintf_s(info, _countof(info) - 1, " = %d\r\n", ret);
+		OutputDebugStringA(("[TWAIN]Load: " + std::string(path_dll) + info).c_str());
+		if (!h && (ret == ERROR_MOD_NOT_FOUND || ret == ERROR_BAD_EXE_FORMAT || ret == 0))
+		{
+			std::string	dir(path_dll);
+			size_t			pos = dir.rfind(L'\\');
+			wchar_t			path[MAX_PATH] = { 0 };
+
+			GetDllDirectoryW(_countof(path) - 1, path);
+			if (pos != std::wstring::npos)
+				dir.erase(pos);
+			OutputDebugStringA(("[TWAIN]Load: try change directory to " + dir + "\r\n").c_str());
+			SetDllDirectoryA(dir.c_str());
+			h = LoadLibraryA(path_dll);
+			// h = LoadLibraryExW(path_dll, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
+			ret = GetLastError();
+			sprintf_s(info, _countof(info) - 1, " = %d\r\n", ret);
+			OutputDebugStringA(("[TWAIN]Load: " + std::string(path_dll) + info).c_str());
+			OutputDebugStringW((L"[TWAIN]Load: restore directory to " + std::wstring(path) + L"\r\n").c_str());
+			SetDllDirectoryW(path);
+		}
+
+		if (dll)
+			*dll = h;
+
+		return ret;
+	}
 	static void init_ui(void)
 	{
 		std::string	root(hg_sane_middleware::sane_path());
 
 		if (hui)
 			FreeLibrary(hui);
+		hui = NULL;
 
 		root += OEM_SHORT_NAME_E;
 		root += "TwainUI.dll";
 		// hui = LoadLibraryExA(root.c_str(), NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
-		hui = LoadLibraryA(root.c_str());
+		//hui = LoadLibraryA(root.c_str());
+		load_dll(root.c_str(), &hui);
 		if (!hui)
 		{
 			std::wstring	info(L"Load '" + local_trans::a2u(root.c_str(), CP_UTF8));