Apply Magento Security Patch
http://www.magentocommerce.com/knowledge-base/entry/security-add-handler?mkt_tok=3RkMMJWWfF9wsRojuq%2FNc%2B%2FhmjTEU5z17OwlWae3gIkz2EFye%2BLIHETpodcMScdnM73YDBceEJhqyQJxPr3GJdcN381yRhnlDw%3D%3D