How to show tag immediately

[ohm_g7]

I create zimlet for automatic add tag to mail.
I can add tag to mail but there tag was not updated immediately.
After I reload page there tag was add to mail.

I found one thing for update tag to mail immediately.

var view = appCtxt.getCurrentView();
var msg = view.getMsg()
...
// add tag to mail
...
/// reload msg //
msg._loaded=false;
msg.load(msg)l

But I got some problem.
I see in msg._bodyPart , in this I saw duplicate object.
So when I use this mail to follow , the body was duplicate.

I don't know how to solve this problem or how I update tag to mail immedately.

Thank for reply.

[lfasci]

I use this javascript function to add the tag and refresh:

myzimlet.prototype.addTagToMsg =
function (doTag, msgOrConvObj, tagName) {
var tagObj = appCtxt.getActiveAccount().trees.TAG.getByName(tag Name);
if(!tagObj)
return;
var tagId = tagObj.id;
var axnType = "";
if (doTag)
axnType = "tag"; //tag
else
axnType = "!tag"; //untag

var soapCmd = ZmItem.SOAP_CMD[msgOrConvObj.type] + "Request";
var itemActionRequest = {};
itemActionRequest[soapCmd] = {_jsns:"urn:zimbraMail"};
var request = itemActionRequest[soapCmd];
var action = request.action = {};
action.id = msgOrConvObj.id;
action.op = axnType;
action.tag = tagId;
var params = {asyncMode: true, callback: null, jsonObj:itemActionRequest};
appCtxt.getAppController().sendRequest(params);
};

Called by

this.addTagToMsg("tag", msg,"Read");

Bye

[ohm_g7]

Thank you very much.