Adobe InDesign CS6 (8.0) Asset.placeAsset(document) getting undefined

Question

UPDATE:
I commented out the addpage line and the script ran without any issues. So the error seems to come about when adding a page and then adding the library asset to it. So the question seems to lie in , "how to add a library asset on a new page?" The code below seemed to work with CS2.
Hi - We wrote .jsx scripts for the CS2 version of InDesign. We now have InDesign CS6. When we run the scripts we get the following error:
The basic function of the script is to import an xml file, select a library, get a specific asset from the library and then adds it to the document.
This is the section of code in the .jsx file that is generating the error; line 204 is generating the error
I've checked both theTemplate and myDocument objects at the time of execution and they are both valid objects.
I have no idea why it would throw an undefined is not an object error message? I've scoured the internet and I am unable to find anything related to this matter and the guy who wrote the scripts has left the the company. Any help in the right direction is greatly appreciated.
Also, this question was already asked in the Indesign forum, and they suggested I should ask this question here after no solution was found.
Adobe InDesign CS6 (8.0) Asset.placeAsset(document) getting undefined

Answer 1

We are using InDesign CS6 version 8.1.
When I refer to the "old" libraries I am referring to InDesign libraries that were created using InDesign CS2 back in 2006, and "new" libraries are libraries created using InDesign CS6 in 2014.
I just found out that the library assets in the "new" libraries were created by opening a document and dragging items from the Structure panel onto the Library panel.
This is why the script was having problems placing the asset on to a document and the root of the problem. This should not have been done.
I just created a new library and added a library asset by opening a document with pageitems on it and clicking on the New Library button on the Library Panel. I then ran my script and everything worked.
Sorry for the confusion. There seems to have been some misunderstanding within our team.
Nevertheless it was a great learning experience.  Thanks for your help.