Hi Taufiq!
Thanks for being a part of beruby! We are happy to have you with us... as far as how our website works, the best thing to do is to add us to your facebook and twitter so that we can provide you with real time support. Also, check out some of our blog posts which contain some great info and helpful tips for using beruby. I
Keep in mind though that Beruby US is intended for users residing in the United States and a large majority of our advertisers only choose to give offers to residents living there.  Since you are in Malaysia, your best bet is to take advantage of the thing you can (that which has rubies attached to it) and try to get a network growing for yourself in the United States.
Here are some links to check out to get you started...
http://blog.beruby.com/us/2011/04/15/how-to-make-while-paying-your-taxes/
http://blog.beruby.com/us/2011/04/07/get-ready-to-beruby-surprised/
http://blog.beruby.com/us/2011/04/05/shop-til-you-drop-or-browse-before-buying/
http://blog.beruby.com/us/2011/03/10/not-your-average-cashback-beruby-com-has-gone-social/
http://blog.beruby.com/us/2011/05/20/youve-got-mail/
Hope that helps you out a little bit more. Let me know if you have further questions!
All the best
—Tobi