Bc2000 (for the BCF2000 & BCR2000)

hello everyone
im a completely beginner with both behringer bcr 2000 and the software (ableton live 8,2,2).
the previous week i just purchased a used bcr and i would like to know how to sync it with the software ableton live,
i visited the website of ableton and i found out that it is a supported midi controller.
after that , i reset everything and upgraded the firmware and the usb,
my connection is that the bcr is connected with the usb cable to the computer.
everything looks that works (usb mode 1 , the knobs looks fine) but i have no idea how to use it for the ableton live,
i want to start using it in order to play live performances as a dj.
i read some manuals and some things about the program called bc manager but i have no idea where to start,the manuals were really compicated for me.
can someone help me on how to connect it and how to map it through the ableton live?
im using google a lot these days but i can't really find any answers for it.
thank you.