1. Please follow our posting guidelines. In particular, we require the use of descriptive thread titles, and our posting guidelines specifically prohibit the thread title "problem."
2. You extracted incorrectly. Try again. There is no "rockbox" folder in the build file. There is a ".rockbox" folder and a file called "rockbox.iaudio" and both of these should end up getting extracted to the proper place if you just extract the entire contents of the .zip file to the root of your player. So, for example, if your player is drive F:, then extract the entire contents of the .zip file to F:\ and everything will end up where it needs to be.