For experimentation you might want to start by trying to enter the value directly as text, like that:
<property name="context>Test</property>
I don't think you can pass multirows directly as the context property - as far as I know they are something different than a simple list. Maybe you want to use db_list_of_lists instead.
Also did you make sure that the parameter that switches the context bar on is set correctly? It's in acs-subsite I think, and some time ago it was set to 0 by default.
