Some Atrributes Not Showing Up In Thick Client Query

Using RTC client, I have been using the capability to set numerous attributes by running a query, selecting all of the found records, displaying the columns that I want, selecting the rows in the column and then resetting or changing the attribute.  It works great for some attributes and use to work for "Subscribed By".  Now I can't even get "Subscribed By" to be displayed when I run the query.  I go back to the web client, and sure enough the column of subscribers shows up in the "Subscribed By" column, but when I run the same query on the client, the column doesn't even show.  This used to work and now doesn't.  What would cause this column to no longer be displayed?