Checker works however does not show indications in the buffer window. Help needed

[martinez]

I have installed c/c++-googlelint, it is present in the list flymake-checkers.
flycheck-very-setup shows it working and finds the executable.
flycheck-compile runs the googlelint checker, finds errors in the other buffer and I can navigate the error list, navigate etc.. OK
However! The warnings do not appear in the text buffer! I use other checkers for C++ (irony), LISP; they display fine.

I need docs to explain how to make it work. My emacs is 24.5.

My config is this:

(require 'flycheck-google-cpplint)
(flycheck-add-next-checker 'c/c++-cppcheck
                           '(warning . c/c++-googlelint))

value of flycheck-checkers:

(irony ada-gnat asciidoc c/c++-clang c/c++-gcc c/c++-cppcheck cfengine chef-foodcritic coffee coffee-coffeelint coq css-csslint d-dmd emacs-lisp emacs-lisp-checkdoc erlang eruby-erubis fortran-gfortran go-gofmt go-golint go-vet go-build go-test go-errcheck haml handlebars haskell-ghc haskell-hlint html-tidy javascript-jshint javascript-eslint javascript-gjslint javascript-jscs javascript-standard json-jsonlint less luacheck lua perl perl-perlcritic php php-phpmd php-phpcs puppet-parser puppet-lint python-flake8 python-pylint python-pycompile r-lintr racket rpm-rpmlint rst rst-sphinx ruby-rubocop ruby-rubylint ruby ruby-jruby rust sass scala scala-scalastyle scss-lint scss sh-bash sh-posix-dash sh-posix-bash sh-zsh sh-shellcheck slim tex-chktex tex-lacheck texinfo verilog-verilator xml-xmlstarlet xml-xmllint yaml-jsyaml yaml-ruby c/c++-googlelint)