Search always result Index: 0

[zawmn83]

I'm new to google play crawler and java, my server is on Amazon cloud, US Region.
I update /home/ubuntu/google-play-crawler-master/googleplay/crawler.conf with my gmail account and password.

root@ubuntupc:/home/ubuntu/google-play-crawler-master/googleplay# java -jar googleplay.jar -f crawler.conf checkin
Your account succesfully checkined!
AndroidID : 33dd2d49569f3f23
SecurityToken : 4eb656111550c479

I update /home/ubuntu/google-play-crawler-master/googleplay/crawler.conf with above AndroidID and SecurityToken

root@ubuntupc:/home/ubuntu/google-play-crawler-master/googleplay# java -jar googleplay.jar -f crawler.conf register
A device is registered to your account! You can see it at "https://play.google.com/store/account" after a few downloads!

root@ubuntupc:/home/ubuntu/google-play-crawler-master/googleplay# java -jar googleplay.jar -f crawler.conf search games
Title;Package;Creator;Price;Installation Size;Number Of Downloads
Index: 0
root@ubuntupc:/home/ubuntu/google-play-crawler-master/googleplay# java -jar googleplay.jar -f crawler.conf search facebook
Title;Package;Creator;Price;Installation Size;Number Of Downloads
Index: 0
root@ubuntupc:/home/ubuntu/google-play-crawler-master/googleplay# java -jar googleplay.jar -f crawler.conf search play
Title;Package;Creator;Price;Installation Size;Number Of Downloads
Index: 0

Any suggestion on why I always get Index:0 ?