Modeling object queries

[Richard Frovarp]

I'm trying to figure out how to model a couple of named queries, 
preferably in the object modeler:

I've got this working
Qualifier: status = $status

I can't get this working

Qualifier: status = "Completed"

In fact, that query returns nothing, but

status != "Completed"

Returns everything, including objects where status = "Completed".