kxml2 removeChild problem

[binsint]

hi everyone! i want to delete a specific node but the function destroys the structure of my xml

this is my code:

public void deleteItem(String path,String filename,int index) throws IOException
    {
        currentMenu="Forward";
        String url = path + filename;
        fc = (FileConnection) Connector.open(url,Connector.READ_WRITE);
        in = fc.openInputStream();
        document = new Document();
        isr = new InputStreamReader(in);
        try
        {
            parser.setInput(isr);
            document.parse(parser);
            Element el_root = document.getRootElement();
            Element el_sms = el_root.getElement(index + 1);    
            el_sms.removeChild(index+1);
            os = fc.openDataOutputStream();
            serializer.setOutput(os, "UTF-8");
            document.write(serializer);
            fc.close();
            in.close();
            isr.close();
        }

        catch (Exception ioe)
        {
        }
    }

this is my xml before i remove the child:

<?xml version='1.0' encoding='UTF-8' standalone='no' ?>
<root>
<sms status="read"><number>639274666258</number><msg>j </msg></sms><sms status="read"><number>639274666258</number><msg>gj </msg></sms>
</root>

this is my xm AFTER i use removeChild();

<?xml version='1.0' encoding='UTF-8' standalone='no' ?>
<root>
<sms status="read"><number>639274666258</number><msg>j </msg></sms><sms statu</root>umber><msg>gj </msg></sms>

it destroys my xml.what seems to be the problem? thanks

[binsint]

can anyone please help me? please