diff --git a/e107.htaccess b/e107.htaccess
index 0174b7344..9ed7256db 100644
--- a/e107.htaccess
+++ b/e107.htaccess
@@ -38,6 +38,9 @@
 ### LimitRequestBody 10240000
 
 <IfModule mod_rewrite.c>
+
+SetEnv HTTP_MOD_REWRITE On
+
 ### enable rewrites
 	Options +FollowSymLinks 
 	RewriteEngine On
diff --git a/e107_admin/eurl.php b/e107_admin/eurl.php
index 17613ed6f..a3723d1e3 100644
--- a/e107_admin/eurl.php
+++ b/e107_admin/eurl.php
@@ -63,6 +63,14 @@ class eurl_admin_ui extends e_admin_controller_ui
 	
 	public function init()
 	{
+
+
+		$htaccess = file_get_contents(e_BASE.".htaccess");
+
+		if(strpos($htaccess, 'SetEnv HTTP_MOD_REWRITE On')===false)
+		{
+			e107::getMessage()->addWarning("Mod-rewrite is disabled. Please add the following to your <b>.htaccess</b> file after the line \"Rewrite Engine On\":<br /><pre>SetEnv HTTP_MOD_REWRITE On</pre>");
+		}
 	
 		if(is_array($_POST['rebuild']))
 		{
@@ -151,12 +159,18 @@ class eurl_admin_ui extends e_admin_controller_ui
 	public function simplePage()
 	{
 		// $this->addTitle("Simple Redirects");
-		$eUrl =e107::getAddonConfig('e_url'); 
+		$eUrl =e107::getAddonConfig('e_url');
 		
 		if(empty($eUrl))
 		{
 			return; 		
 		}
+
+
+
+
+
+
 		
 		$text = "";
 			
diff --git a/e107_handlers/e107_class.php b/e107_handlers/e107_class.php
index 4a1d959a8..37a76bd7d 100644
--- a/e107_handlers/e107_class.php
+++ b/e107_handlers/e107_class.php
@@ -2617,9 +2617,7 @@ class e107
 
 		if(varset($tmp[$plugin][$key]['sef']))
 		{
-			$mode = 'sef'; //TODO Auto-detect when mod-rewrite is active.
-
-			if($mode == 'sef')  // Search-Engine-Friendly URL
+			if(deftrue('e_MOD_REWRITE'))  // Search-Engine-Friendly URL
 			{
 				$rawUrl = $tp->simpleParse($tmp[$plugin][$key]['sef'], $row);
 				return e_HTTP.$rawUrl;
@@ -3004,6 +3002,8 @@ class e107
 
 		define('CHARSET', 'utf-8'); // set CHARSET for backward compatibility
 
+		define('e_MOD_REWRITE', (getenv('HTTP_MOD_REWRITE')=='On' ? true : false));
+
 		// Define the domain name and subdomain name.
 		if(is_numeric(str_replace(".","",$_SERVER['HTTP_HOST'])))
 		{