diff --git a/sdk/webscan/WebUser.cpp b/sdk/webscan/WebUser.cpp
index 5e49e1aa..8be87975 100644
--- a/sdk/webscan/WebUser.cpp
+++ b/sdk/webscan/WebUser.cpp
@@ -237,6 +237,18 @@ WebUser::WebUser(WebServer* server, HGUInt id, HGMsgPump msgPump, const std::str
 
 	SANE_Int version_code = 0;
 	sane_init_ex(&version_code, sane_ex_callback, this);
+
+#if defined(HG_CMP_MSC)
+	Sleep(500);
+#else
+	usleep(500 * 1000);
+#endif
+
+	if (!m_server->IsOld())
+	{
+		std::string cmd = "CDEV";
+		PostCmdMsg((const HGByte*)cmd.c_str(), (HGUInt)cmd.size());
+	}
 }
 
 WebUser::~WebUser()
@@ -867,7 +879,7 @@ void WebUser::GetSettingInfoNew(const std::string& devName)
 					AddOptItem(optJson, arrayJson, "filetype", m_filetype.c_str(), fileTypeList);
 					const char* showBase64List[] = { "0", "1", NULL };
 					AddOptItem(optJson, arrayJson, "showbase64", m_showbase64.c_str(), showBase64List);
-					const char* sourceList[] = { "Adf-duplex", NULL };
+					const char* sourceList[] = { "Adf-front", "Adf-back", "Adf-duplex", NULL };
 					AddOptItem(optJson, arrayJson, "source", m_source.c_str(), sourceList);
 					const char* modeList[] = { "Lineart", "Gray", "Color", NULL };
 					AddOptItem(optJson, arrayJson, "mode", m_mode.c_str(), modeList);
@@ -1759,27 +1771,6 @@ std::string WebUser::GetBase64(const std::string& filePath)
 		fclose(file);
 	}
 
-	if (!base64.empty())
-	{
-		HGUInt imgType = 0;
-		HGImgFmt_GetImgFmtType(filePath.c_str(), &imgType);
-
-		std::string prefix;
-		if (HGIMGFMT_TYPE_JPEG == imgType)
-			prefix = "data:image/jpeg;base64,";
-		else if (HGIMGFMT_TYPE_BMP == imgType)
-			prefix = "data:image/bmp;base64,";
-		else if (HGIMGFMT_TYPE_PNG == imgType)
-			prefix = "data:image/png;base64,";
-		else if (HGIMGFMT_TYPE_TIFF == imgType)
-			prefix = "data:image/tiff;base64,";
-		else if (HGIMGFMT_TYPE_PDF == imgType)
-			prefix = "data:application/pdf;base64,";
-		else if (HGIMGFMT_TYPE_PNM == imgType)
-			prefix = "data:image/pnm;base64,";
-		base64.insert(0, prefix);
-	}
-
 	return base64;
 }
 
@@ -1898,6 +1889,25 @@ void WebUser::SetParam(const std::string& devParam)
 		cJSON_Delete(json);
 	}
 
+	if (m_source == "Adf-front")
+	{
+		SetParam(OPTION_TITLE_SMYM, OPTION_VALUE_SMYM_DM);
+		HGBool b = HGFALSE;
+		SetParam(OPTION_TITLE_JHZFM, &b);
+	}
+	else if (m_source == "Adf-back")
+	{
+		SetParam(OPTION_TITLE_SMYM, OPTION_VALUE_SMYM_DM);
+		HGBool b = HGTRUE;
+		SetParam(OPTION_TITLE_JHZFM, &b);
+	}
+	else
+	{
+		SetParam(OPTION_TITLE_SMYM, OPTION_VALUE_SMYM_SM);
+		HGBool b = HGFALSE;
+		SetParam(OPTION_TITLE_JHZFM, &b);
+	}
+
 	if (m_mode == "Lineart")
 	{
 		SetParam(OPTION_TITLE_YSMS, OPTION_VALUE_YSMS_HB);
@@ -1946,7 +1956,8 @@ void WebUser::SetParam(const std::string& devParam)
 
 	if (m_blankpageskip == "yes")
 	{
-		SetParam(OPTION_TITLE_SMYM, OPTION_VALUE_SMYM_TGKBYTY);
+		HGBool b = HGTRUE;
+		SetParam(OPTION_TITLE_TGKBY, &b);
 
 		HGInt value = 50;
 		if (m_blankpageskipsensitivity == "1")
@@ -1961,7 +1972,8 @@ void WebUser::SetParam(const std::string& devParam)
 	}
 	else
 	{
-		SetParam(OPTION_TITLE_SMYM, OPTION_VALUE_SMYM_SM);
+		HGBool b = HGFALSE;
+		SetParam(OPTION_TITLE_TGKBY, &b);
 	}
 
 	if (atoi(m_deletefilesbeforescan.c_str()))
diff --git a/test/webscan-new/web-api.html b/test/webscan-new/web-api.html
index 2efc8fb0..f54cf173 100644
--- a/test/webscan-new/web-api.html
+++ b/test/webscan-new/web-api.html
@@ -66,7 +66,7 @@
 			if (base64)
 			{
 				var myCanvas = document.getElementById("myCanvas");
-				myCanvas.src = base64;
+				myCanvas.src = "data:image/png;base64," + base64;
 			}
 		}
 		
@@ -81,7 +81,7 @@
 			if (imgbase64data)
 			{
 				var myCanvas = document.getElementById("myCanvas");
-				myCanvas.src = imgbase64data;
+				myCanvas.src = "data:image/jpeg;base64," + imgbase64data;
 			}
 		}