insert an element into an instance in xforms:model

Hello All,

<new-company>

<friend xmlns:xmldb="http://exist-db.org/xquery/xmldb" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:oxf="http://www.orbeon.com/oxf/processors" xmlns:p="http://www.orbeon.com/oxf/pipeline" xmlns:xdb="http://orbeon.org/oxf/xml/xmldb" xmlns:xu="http://www.xmldb.org/xupdate">

<screenName>10114</screenName>

<portraitId>0</portraitId>

<email>[hidden email]</email>

<ischeckedin/>

<comment></comment>

</friend>

<friend xmlns:xmldb="http://exist-db.org/xquery/xmldb" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:oxf="http://www.orbeon.com/oxf/processors" xmlns:p="http://www.orbeon.com/oxf/pipeline" xmlns:xdb="http://orbeon.org/oxf/xml/xmldb" xmlns:xu="http://www.xmldb.org/xupdate">

<screenName>srikanth</screenName>

<portraitId>0</portraitId>

<email>[hidden email]</email>

<ischeckedin/>

<comment></comment>

</friend>

</new-company>

------------------------------------------------------------------

<Response>

<EventReference>

<friends>

<id>10114</id>

<comment>hi</comment>

</friends>

</EventReference>

<EventReference>

<friends>

<id>10164</id>

<comment>hello</comment>

</friends>

</EventReference>

</Response>

I’m trying to set value comment element in first instance from second instance in xforms model  but the values are not set in first instance

<xforms:action ev:event="xforms-ready" xxforms:iterate="instance('friendslist')/EventReference/friends/comment">

                <xforms:setvalue ref="instance('friend')/friend/comment" value="context()"/>

            </xforms:action>  

Thanks,

Srikanth A