Variable Text in Rollout

Hello

how to make variable text in rollout?
as I understand one should be using "label" command

example from help:

======================================================================
rollout test "Test Label"
(
label lab1 "Sorry For The Inconveniences!"
label lab2 "DoN't PaNiC!" style_sunkenedge:true width:150 height:16
)
createDialog test
======================================================================

but after changing lab1 and lab2 they doesn`t change, and I get error:
http://www.ipix.lt/images/75674764.jpg

edit.. got the answer.. if anybody interested, then You should be using "lab1.caption = " command