Hi Ofer
It may be that WPFTreeViewItem doesn't accept wild cards. I haven't worked with such controls myself, but it may be that you need to use the Item property to specify a specific item. See WPFTreeViewItem Object in the help files.
I still think, however, that the WaitAliasChild section of your statement is wrong as it looks like you are passing 3 parameters rather than 2. If you refer to the help files, for the WaitAliasChild method, you can see an example of its use and this can be displayed in your scripting language, which should give you a better understanding of its use.
Regards
Stephen.
