SAP NW 7.4 Get for navigation tree for user using LSAPI

Hello experts,

NW 7.4 Portal

I am trying to get the full navigation tree for a logged user so i can create a mega-menu.

Currently using this but only gets down to level 2

eg

My Work

     --> System Admin

          ---> S 1

          ---> S2

Will only retrieve My Work & System Admin, and not any other levels below this

var _parseNavigationNodes = function(nodes, args)

  {

  if (!nodes) return;    

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

  {

         var node, title, nodeUri, hasChildren;

         node = nodes[i];

         nodeUri = node.getNodeURI();

         hasChildren = node.hasChildren();

         title = node.getTitle();

         console.log("Found Node --> " + title);

         // if the node has children, perform recursive call

         if (hasChildren)

         {

         console.log(title + " Has Child Nodes -->");

          node.getChildren(_parseNavigationNodes);

         }

  }

  }

Any ideas why lower levels are not retreived. I have noticed errors in browser console..

Found Node --> System Administration afpmasthead.js?4c769db5aeafef8971c63348e2b6504d:963

System Administration Has Child Nodes --> afpmasthead.js?4c769db5aeafef8971c63348e2b6504d:967

Refused to set unsafe header "Content-length" core_navigation.js?54764b0de3ee371dbf996d4134af4243:1AFPConnection.request core_navigation.js?54764b0de3ee371dbf996d4134af4243:1AFPConnection.requestIfUpdated core_navigation.js?54764b0de3ee371dbf996d4134af4243:1LSAPI.AFPPlugin.model.b core_navigation.js?54764b0de3ee371dbf996d4134af4243:1LSAPI.AFPPlugin.model.H core_navigation.js?54764b0de3ee371dbf996d4134af4243:1getChildren core_navigation.js?54764b0de3ee371dbf996d4134af4243:1_parseNavigationNodes afpmasthead.js?4c769db5aeafef8971c63348e2b6504d:968getChildren core_navigation.js?54764b0de3ee371dbf996d4134af4243:1_parseNavigationNodes afpmasthead.js?4c769db5aeafef8971c63348e2b6504d:968LSAPI.AFPPlugin.model.w core_navigation.js?54764b0de3ee371dbf996d4134af4243:1AFPConnection.handleResponse core_navigation.js?54764b0de3ee371dbf996d4134af4243:1(anonymous function)