Sip trunk custom

Hello, I have in extensions_additional.conf this:

[from-trunk-sip-3584210000]
include => from-trunk-sip-3584210000-custom
exten => _.,1,Set(GROUP()=OUT_2)
exten => _.,n,Goto(from-trunk,${EXTEN},1)

But when I create rules in the context [from-trunk-sip-3584210000-custom] in the file extensions_custom.conf it’s like the line:

include => from-trunk-sip-3584210000-custom

doesnt work, the asterisk follows doing the same as without the new context.

Suggestions?

Thanks in advance