how to rename friendlyName

[yl yl]

hi,all,
Im using renameFriend(Email email, String friendlyName) to change the friend's name,and when the friendlyName is chinese,there is an error occur.
the xml is :
<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/">
<soap:Header>
<ABApplicationHeader xmlns="http://www.msn.com/webservices/AddressBook">
<ApplicationId>996CDE1E-AA53-4477-B943-2BE802EA6166</ApplicationId>
<IsMigration>false</IsMigration>
<PartnerScenario>Timer</PartnerScenario>
</ABApplicationHeader>
<ABAuthHeader xmlns="http://www.msn.com/webservices/AddressBook">
<ManagedGroupRequest>false</ManagedGroupRequest>
<TicketToken>t=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&amp;p=</TicketToken>
</ABAuthHeader>
</soap:Header>
<soap:Body>
    <ABContactUpdate xmlns="http://www.msn.com/webservices/AddressBook">        <abId>00000000-0000-0000-0000-000000000000</abId>        <contacts>           <Contact xmlns="http://www.msn.com/webservices/AddressBook">               <contactId>0830f6f4-a009-4d80-a50c-66b2ddc6334a</contactId>               <contactInfo>                   <displayName>中文</displayName>               </contactInfo>               <propertiesChanged>DisplayName</propertiesChanged>           </Contact>        </contacts>    </ABContactUpdate></soap:Body>
</soap:Envelope>

Thanks

[yl yl]

2011-2-15 13:28:09 net.sf.jml.protocol.soap.ContactList sendRequest
严重: something wrong!
java.lang.Exception
at net.sf.jml.protocol.soap.ContactList.sendRequest(ContactList.java:276)
at net.sf.jml.protocol.soap.ContactList.sendRequest(ContactList.java:160)
at net.sf.jml.protocol.soap.ContactList.updateFriend(ContactList.java:1397)
at net.sf.jml.impl.SimpleMessenger.renameFriend(SimpleMessenger.java:339)
at jml.LoginAction.changeFriendlyName(LoginAction.java:230)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)