Displaying Custom Attributes

I'm trying to add some custom attributes to the objects in my scene so I can write them out as a text file. Here's my problem. I enter a value for the custom attribute on box01, I select box02 and enter something else. When I go back to box01, I can't see the value I entered for it's CAs. Is there a way to get the custom attribute rollout to display the values on the object already?
Here's my code:

FloodData = attributes FloodDataV_1
(
parameters main rollout:params
(
floodclass type:#string
dotxfile type:#string
)

rollout params "Game Parameters"
(
edittext class_txt "Class:"
on class_txt entered ctxt do floodclass = ctxt

edittext dotxfile_txt "X file:"
on dotxfile_txt entered dtxt do dotxfile = dtxt
)
)