You need to install the Windows 7 drivers for that model from the Brother support website.
This is the drivers page for that model: http://welcome.solutions.brother.com/bsc/public/eu/gb/en/dlf/download_top.html?reg=eu&c=gb&lang=en&prod=mfcj430w_all
First thing you must do is select either Windows 7 (32-bit)
or Windows 7 (64-bit)
as appropriate for your operating system.