inserting ZMSLinkElement via manage_addZMSObject

hi folks,

i try to insert ZMSLinkElements via manage_addZMSObject

my code:
<dtml-call "manage_addZMSObject('ZMSCustom', values={'meta_id': 'ZMSLinkElement', 'attr_ref': 'http://www.someurl.com'}, REQUEST={'lang': lang})">

doing this i get the following error:
-----------------------------------------------
    *  Module DocumentTemplate.DT_String, line 476, in __call__
    * Module DocumentTemplate.DT_In, line 703, in renderwob
    * Module DocumentTemplate.DT_Util, line 196, in eval
      __traceback_info__: manage_addZMSObject
    * Module <string>, line 1, in <expression>
    * Module Products.zms.zmscontainerobject, line 216, in manage_addZMSObject
    * Module Products.zms._versionmanager, line 530, in onChangeObj
    * Module Products.zms._versionmanager, line 1365, in commitObj
    * Module Products.zms._versionmanager, line 669, in commitObjChanges
    * Module Products.zms._versionmanager, line 660, in _commitObjChanges
    * Module Products.zms._versionmanager, line 552, in onSynchronizeObj
    * Module Products.zms._accessmanager, line 295, in synchronizePublicAccess

AttributeError: isEmbedded
-----------------------------------------------

in line _accessmanager on line 295 there is:
if self.meta_id == 'ZMSLinkElement' and self.isEmbedded( self.REQUEST):

i have no clue why isEmbedded doesnt work here.

i tried to figure out what zms does itself when i manually insert a new link elemenet, but manage_addZMSLinkElement in zmslinkelement.py is using its own code with a redirect at the end. so i cant use this really in my case.

my understanding of the new object model is to use manage_ZMSCustom/Object for inserting new stuff.
why does the manage_addZMSLinkElement in zmslinkelement.py doing its own stuff, instead of using those functions? i guess thats the case with other objects too.

best regards

rainer feigl