SOAPメッセージのアンマーシャル

JAVAでSOAPメッセージをJAXBを使用してBeanにマッピングしたいのですがうまくいきません。
何かおかしなところがあれば教えていただきたいです。どうぞよろしくお願いします。

###該当のソースコード

XML
1<?xml version="1.0" encoding="UTF-8" standalone="no"?>
2<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
3        xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
4        xmlns:ns1="urn:Samplewsdl"
5        xmlns:xsd="http://www.w3.org/2001/XMLSchema"
6        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
7        SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
8    <SOAP-ENV:Header />
9    <SOAP-ENV:Body>
10        <ns1:sampleResponse>
11            <return xsi:type="ns1:sampleInfo">
12                <name xsi:type="xsd:string">名前</name>
13                <address xsi:type="xsd:string">住所</address>
14            </return>
15        </ns1:sampleResponse>
16    </SOAP-ENV:Body>
17</SOAP-ENV:Envelope>

java
1@XmlAccessorType(XmlAccessType.FIELD)
2@XmlRootElement(name = "return")
3public class SearchSample {
4
5    private String name;
6    private String address;
7   
8    public String getName() {
9        return name;
10    }
11
12    public void setName(String name) {
13        this.name = name;
14    }
15
16    public String getAddress() {
17        return address;
18    }
19
20    public void setAddress(String address) {
21        this.address = address;
22    }

Java
1    public void unMarshal() {
2        String xml="<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><SOAP-ENV:Envelope xmlns:SOAP-ENV=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:SOAP-ENC=\"http://schemas.xmlsoap.org/soap/encoding/\" xmlns:ns1=\"urn:Samplewsdl\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" SOAP-ENV:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\"><SOAP-ENV:Header /><SOAP-ENV:Body><ns1:sampleResponse><return xsi:type=\"ns1:sampleInfo\"><name xsi:type=\"xsd:string\">名前</name><address xsi:type=\"xsd:string\">住所</address></return></ns1:sampleResponse></SOAP-ENV:Body></SOAP-ENV:Envelope>
3";
4        SearchSample searchSample = JAXB.unmarshal(new StringReader(xml), SearchSample.class);
5    }