check out these links,i think its wise to stay away from kingbux.biz for the time being
http://uronlinebiz.com/xtremeptc.htm
http://ptctalk.com/forums/index.php/topic,9252.0.html

and also quotes from http://www.squidoo.com/ptc-scam-list
March 13 2008: Kingbux.biz has virus and phishing problems.
March 11 2008: Dailybux.info has the same owner as kingbux.biz which have not been paying.
March 5 2008: KingBux.biz complaints of virus and non-payments. kingbux