Testing for structural breaks

Hey everyone!

I'm trying to run a test for structural breaks, but I have a problem. Whereever I am searching on the internet, the command "estat sbsingle" is recommended. So first I ran my regression with only two variables, but if I type "estat sbsingle", the programm responds:

invalid subcommand sbsingle

Might my version of Stata be too old? I'm using Stata 12.0. Or does anyone have better ideas why this command is not working?

Thanks for your help!

Andreas