diff --git a/upload/source/function/function_core.php b/upload/source/function/function_core.php
index 9ea09b16f8a37975e428bbef0dd9e316fd0190fa..b0b0bf147c7713c6948bf94c8754118e93b84353 100644
--- a/upload/source/function/function_core.php
+++ b/upload/source/function/function_core.php
@@ -1543,8 +1543,8 @@ function dreferer($default = '') {
 
 function ftpcmd($cmd, $arg1 = '') {
 	static $ftp;
-	$ftpon = getglobal('setting/ftp/on');
-	if(!$ftpon) {
+	$ftpconfig = getglobal('setting/ftp');
+	if(empty($ftpconfig['on']) || empty($ftpconfig['host'])) {
 		return $cmd == 'error' ? -101 : 0;
 	} elseif($ftp == null) {
 		$ftp = & discuz_ftp::instance();
diff --git a/upload/source/module/forum/forum_attachment.php b/upload/source/module/forum/forum_attachment.php
index 2a61aee9ed3c060a1cafafe8f2ab3b6d00a562c3..f933b3bf4f9087c1032e05c103985826e77c3ae3 100644
--- a/upload/source/module/forum/forum_attachment.php
+++ b/upload/source/module/forum/forum_attachment.php
@@ -309,7 +309,7 @@ function getremotefile($file) {
 	if(!@readfile($_G['setting']['ftp']['attachurl'].'forum/'.$file)) {
 		$ftp = ftpcmd('object');
 		$tmpfile = @tempnam($_G['setting']['attachdir'], '');
-		if($ftp->ftp_get($tmpfile, 'forum/'.$file, FTP_BINARY)) {
+		if(is_object($ftp) && $ftp->ftp_get($tmpfile, 'forum/'.$file, FTP_BINARY)) {
 			@readfile($tmpfile);
 			@unlink($tmpfile);
 		} else {