Error in installing FRC tools for Eclipse

I am trying to follow the instructions on this page, but I am stuck on the part where we have to use the url given. I use precisely this link: http://frcbuilder.wpi.edu:8190/view/2015/job/eclipse-plugins/lastSuccessfulBuild/artifact/edu.wpi.first.wpilib.plugins.updatesite/target/site/, but eclipse gives me a timeout error, saying the page cannot be reached. Any idea as to why this is happening and how to circumvent it?

Whoops! That is a page that’s pretty out of date. You should be using the instructions here: http://wpilib.screenstepslive.com/s/4485. Just follow the instructions for the language you are using.

Thank you!

Oh wait one more thing: When I try to install the c++ version, it gives me this error:

“Cannot complete the install because one or more required items could not be found.
Software being installed: Robot C++ Development 0.1.0.201501011639 (edu.wpi.first.wpilib.plugins.cpp.feature.feature.group 0.1.0.201501011639)”

Any reason as to why that is?