diff --git a/package.json b/package.json
index 17f4724..4ed93dd 100644
--- a/package.json
+++ b/package.json
@@ -51,11 +51,6 @@
                     "default": true,
                     "type": "boolean"
                 },
-                "markdown-preview-enhanced.automaticallyShowPreviewOfMarkdownBeingEdited": {
-                    "description": "Automatically show preview of markdown being edited",
-                    "default": false,
-                    "type": "boolean"
-                },
                 "markdown-preview-enhanced.enableTypographer": {
                     "description": "Enable smartypants and other sweet transforms.",
                     "default": false,
diff --git a/src/extension.ts b/src/extension.ts
index 55ca599..f5efc48 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -102,6 +102,7 @@ export function activate(context: vscode.ExtensionContext) {
 	 * Open preview automatically if the `automaticallyShowPreviewOfMarkdownBeingEdited` is on.  
 	 * @param textEditor 
 	 */
+	/*
 	function openPreviewAutomatically(textEditor:vscode.TextEditor) {
 		if (!textEditor) return 
 
@@ -129,7 +130,7 @@ export function activate(context: vscode.ExtensionContext) {
 		openPreviewAutomatically(textEditor)
 	}))
 
-	/*
+	
 	context.subscriptions.push(vscode.window.onDidChangeVisibleTextEditors(textEditors=> {
 		// console.log('onDidChangeonDidChangeVisibleTextEditors ', textEditors)
 	}))
diff --git a/src/puml.ts b/src/puml.ts
index d3f7c45..38bdd1b 100644
--- a/src/puml.ts
+++ b/src/puml.ts
@@ -97,7 +97,7 @@ export async function render(content:string, fileDirectoryPath:string=""):Promis
 
   let startMatch;
   if (startMatch = content.match(/^\@start(.+?)\s+/m)) {
-    if (content.match(new RegExp("^\\@end#{startMatch[1]}", 'm')))
+    if (content.match(new RegExp(`^\\@end${startMatch[1]}`, 'm')))
       null // do nothing
     else
       content = "@startuml\n@enduml" // error