diff --git a/modules/member/member.admin.controller.php b/modules/member/member.admin.controller.php
index 1463cf27c..94b47255a 100644
--- a/modules/member/member.admin.controller.php
+++ b/modules/member/member.admin.controller.php
@@ -967,7 +967,7 @@ class memberAdminController extends member
 		$groups = $var->groups;
 		$members = $var->member_srls;
 
-		$oDB = &DB::getInstance();
+		$oDB = DB::getInstance();
 		$oDB->begin();
 
 		$oMemberController = getController('member');
@@ -1044,6 +1044,8 @@ class memberAdminController extends member
 			}
 		}
 
+		$oDB->commit();
+		
 		$returnUrl = Context::get('success_return_url') ? Context::get('success_return_url') : getNotEncodedUrl('', 'module', 'admin', 'act', 'dispMemberAdminList');
 		$this->setRedirectUrl($returnUrl);
 	}
@@ -1086,8 +1088,9 @@ class memberAdminController extends member
 		if(!is_array($group_srl)) $group_srls = explode('|@|', $group_srl);
 		else $group_srls = $group_srl;
 
-		$oDB = &DB::getInstance();
+		$oDB = DB::getInstance();
 		$oDB->begin();
+
 		// Delete a group of selected members
 		$args = new stdClass;
 		$args->member_srl = $member_srl;