SRX650 cannot configure LAG on build-in port‏

Hello,
I have one SRX650 with only 4 build-in port. I want to bundle interface to connect to my core switch. But I can not create LAG ae0 from 2 build-in port: ge-0/0/2 and ge-0/0/3 and run LACP. 

I see KB15455

 https://kb.juniper.net/InfoCenter/index?page=content&id=KB15455&actp=search

but it's from 08 Nov 2012. Anyone know any update?

Thanks.