Weird, I used my PB electron to book the hotel from genting.com.my on May 2007. The transaction was successful and no complain on that.

First world, have u deposit money to the pbb card before u make any transaction?

one more thing, you will ned to activate something before you can book online. The reservation page will redirect you to the pbb security page and asked you to call to the call centre,number is shown on the screen.