search keys can't work in SObjectChartWdg

[listy]

Search Keys should look like sthpw/task?code=TASK00000 etc, with Code.
May be just use expression?
...
<expression>@SOBJECT(sthpw/login)</expression>
<x_axis>login</x_axis>
<y_axis>{@SUM(@GET(loginthpw/snapshot.sthpw/file.st_size))/1024/1024}</y_axis>
...