setStateFile problem

[VU, Thi Thu Thuy]

Hello,
I want to use example container and SocialHelloWorld gadget of shindig to test 
my own DB, but when I built it, there were problems with setStateFile. I tried 
to comment it, but with this solution, I couldn't display anything but only one 
button "Say hello".
I don't know how can I fix it.
Could you give me some advices pls?
Thanks a lot.
Thuy