issue with ajax framework page navigation tree till 4th level

hi all,

i've a situation where i'm unable to expand the third-level node in navigation panel of my custom ajax framework page in 7.3 portal.

here is how my navigation.js coded:

- the initial tree function calls:

EPCM.getSAPTop().LSAPI.AFPPlugin.model.getNavigationSubTree(null, drawTopMenu, sapTreeEle);

- drawTopMenu function for drawing the top menu

- the sub function of drawTopMenu calls:

LSAPI.AFPPlugin.controller.registerOnNavigate(drillDownSecMenu);

LSAPI.AFPPlugin.service.navigate(node);

- drillDownSecMenu calls:

var bc = LSAPI.AFPPlugin.model.getCurrentSelectedPath();

var secnodes = bc[0].getChildren(drawSecMenu);

- drawSecMenu draws the second menu and on click it calls clickSecMenu:

- clickSecMenu calls:

LSAPI.AFPPlugin.controller.registerOnNavigate(drillDownLeftMenu);

LSAPI.AFPPlugin.service.navigate(node);

- drillDownLeftMenu function calls:

var bc = LSAPI.AFPPlugin.model.getCurrentSelectedPath();

var secnodes = bc[1].getChildren(drawLeftNavMenu);

- drawLeftNavMenu draws the left menu and calls:

bc = LSAPI.AFPPlugin.model.getCurrentSelectedPath();

secNavNode = bc[1];

secNavNode is used to show title as clickable link

on click it calls: selectLeftNavMenu

- selectLeftNavMenu function does calls doNaviagte

var node = leftNavNodes[index];

EPCM.doNavigate(node.getName());

it works till here. and my code continues like below:

- in selectLeftMenu i'm calling:

var bcT = LSAPI.AFPPlugin.model.getCurrentSelectedPath();

var secnodesT = bcT[2].getChildren(drillDownThirdMenu);

- the drillDownThirdMenu calls:

var bcDTM = LSAPI.AFPPlugin.model.getCurrentSelectedPath();

var secnodesDTM = bcDTM[2].getChildren(expandThridMenu);

- in expandThirdMenu has:

var bcTM = LSAPI.AFPPlugin.model.getCurrentSelectedPath();

  if (nodes) {

  var thirdnodes = nodes;

  for ( var i = 0; i < thirdnodes.length; i++) {

  console.log("thirdnodes:"+thirdnodes[i].getTitle());

  }

  }

now the issue here is the fourth-level nodes only displays when the thirdlevel node is clicked twice. otherwise on the first click it always shows me the previously selected node's children, or the nodes are empty.

i hope there has to be a way to handle this, has any one faced this issue? if yes how did u fixed it? do we've a code to refer to expand the 3rd level to see 4th level nodes or sitemap? or what corrections to be made to my code?