XML not returning correct result format

[gotik]

I am running a php script which calls upon the Amazon MWS API and I am trying to query a book by an isbn number.I get the following returned \[code\]SimpleXMLElement Object( [GetMatchingProductResult] => SimpleXMLElement Object ( [@attributes] => Array ( [ASIN] => 1908256052 [status] => Success ) [Product] => SimpleXMLElement Object ( [Identifiers] => SimpleXMLElement Object ( [MarketplaceASIN] => SimpleXMLElement Object ( [MarketplaceId] => A1F83G8C2ARO7P [ASIN] => 1908256052 ) ) [AttributeSets] => SimpleXMLElement Object ( ) [Relationships] => SimpleXMLElement Object ( ) [SalesRankings] => SimpleXMLElement Object ( [SalesRank] => Array ( [0] => SimpleXMLElement Object ( [ProductCategoryId] => book_display_on_website [Rank] => 3304 ) [1] => SimpleXMLElement Object ( [ProductCategoryId] => 271146 [Rank] => 11 ) [2] => SimpleXMLElement Object ( [ProductCategoryId] => 1039764 [Rank] => 25 ) [3] => SimpleXMLElement Object ( [ProductCategoryId] => 270704 [Rank] => 38 ) ) ) ) ) [ResponseMetadata] => SimpleXMLElement Object ( [RequestId] => bba76d27-9648-4988-b0b6-63b43116d16d ))\[/code\]when I should be getting something like...\[code\]<?xml version="1.0"?><GetMatchingProductResponse xmlns="http://mws.amazonservices.com/schema/Products/2011-10-01"><GetMatchingProductResult ASIN="1908256052" status="Success"> <Product xmlns="http://mws.amazonservices.com/schema/Products/2011-10-01" xmlns:ns2="http://mws.amazonservices.com/schema/Products/2011-10-01/default.xsd"> <Identifiers> <MarketplaceASIN> <MarketplaceId>A1F83G8C2ARO7P</MarketplaceId> <ASIN>1908256052</ASIN> </MarketplaceASIN> </Identifiers> <AttributeSets> <ns2:ItemAttributes xml:lang="en-GB"> <ns2:Author>Slimming World</ns2:Author> <ns2:Binding>Hardcover</ns2:Binding> <ns2:Format>Illustrated</ns2:Format> <ns2:IsEligibleForTradeIn>true</ns2:IsEligibleForTradeIn> <ns2:Label>Slimming World</ns2:Label> <ns2:Languages> <ns2:Language> <ns2:Name>english</ns2:Name> <ns2:Type>Unknown</ns2:Type> </ns2:Language> <ns2:Language> <ns2:Name>english</ns2:Name> <ns2:Type>Original Language</ns2:Type> </ns2:Language> <ns2:Language> <ns2:Name>english</ns2:Name> <ns2:Type>Published</ns2:Type> </ns2:Language> </ns2:Languages> <ns2:ListPrice> <ns2:Amount>16.99</ns2:Amount> <ns2:CurrencyCode>GBP</ns2:CurrencyCode> </ns2:ListPrice> <ns2:Manufacturer>Slimming World</ns2:Manufacturer> <ns2:NumberOfItems>1</ns2:NumberOfItems> <ns2:NumberOfPages>224</ns2:NumberOfPages> <ns2ackageDimensions> <ns2:Height Units="inches">0.87</ns2:Height> <ns2:Length Units="inches">9.69</ns2:Length> <ns2:Width Units="inches">7.64</ns2:Width> <ns2:Weight Units="pounds">1.85</ns2:Weight> </ns2ackageDimensions> <ns2roductGroup>Book</ns2roductGroup> <ns2roductTypeName>ABIS_BOOK</ns2roductTypeName> <ns2ublicationDate>2011-11-20</ns2ublicationDate> <ns2ublisher>Slimming World</ns2ublisher> <ns2:SmallImage> <ns2:URL>http://ecx.images-amazon.com/images/I/61aM-pJlQtL._SL75_.jpg</ns2:URL> <ns2:Height Units="pixels">75</ns2:Height> <ns2:Width Units="pixels">64</ns2:Width> </ns2:SmallImage> <ns2:Studio>Slimming World</ns2:Studio> <ns2:Title>Slimming World Extra Easy All in One</ns2:Title> </ns2:ItemAttributes> </AttributeSets> <Relationships/> <SalesRankings> <SalesRank> <ProductCategoryId>book_display_on_website</ProductCategoryId> <Rank>2767</Rank> </SalesRank> <SalesRank> <ProductCategoryId>271146</ProductCategoryId> <Rank>7</Rank> </SalesRank> <SalesRank> <ProductCategoryId>1039764</ProductCategoryId> <Rank>24</Rank> </SalesRank> <SalesRank> <ProductCategoryId>270704</ProductCategoryId> <Rank>38</Rank> </SalesRank> </SalesRankings> </Product></GetMatchingProductResult><ResponseMetadata> <RequestId>e8dd69e8-7a40-4cab-9793-a666c0648753</RequestId></ResponseMetadata></GetMatchingProductResponse>\[/code\]The function im using is\[code\]public function getXML($url){ $ch = curl_init(); curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); curl_setopt($ch, CURLOPT_URL,$url); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0); $response = curl_exec($ch); return simplexml_load_string($response);}\[/code\]Is there something I am missing? why are different results returned?