How to update Project Plan on project Form

Hello,

I have a Project plan XML ready (i.e. with all WBS Elements,Activities and milestones) in itm.node. Now I have to put this XML in a Project relationship "Project Plan". But it will not update the Project plan.

I used      itm.node = top.aras.updateInCache(itm.node).item;    to update project plan.

But it is not working.

So, Please help me to Solve this.

Thanks in advance.

Anand