GL_ACCUM buffer on OF007

Hi, I have used the accumulation buffer in OF 0062, now I’m trying to use it with the latest version from github, and I can’t let it work anymore…
Have I to enable something in particular with of007??

I’m clearing
drawing stuff …
and setting the buffer
glAccum(GL_MULT, 0.90);
glAccum(GL_ACCUM, 0.10);
glAccum(GL_RETURN, 1.0);

Usually it works…

I’m experiencing the same issue with of007, does anyone know how to get this working?