LP3500 vccmonitor.c don't work ?

Dear All
I’m newbie in LP3500.

Question 1
I’ve try VCCMONITOR.C , but it seem not working!
what wrong?

Question 2
And the program description said that
“have an A/C device installed on your controller”
What is “A/C device” on LP 3500 ???

Seeking your advise :>

My Computer config. : XP
Sinle board computer: LP3500 with protype board