Error message

• amazon_http_request failed; op=ItemSearch, parameters=Array ( [ItemPage] => 5 [SearchIndex] => Books [BrowseNode] => 1000 [ResponseGroup] => Variations,Images,ItemAttributes,OfferFull,EditorialReview,Similarities,AlternateVersions,Large,SearchBins [MerchantId] => Amazon [Condition] => New ) .
• Notice: Trying to get property of non-object in _amazon_store_search() (line 758 of /home/harterim/public_html/dvd2/sites/all/modules/amazon_store/amazon_store.module).