chaos magic must work for everyone by the nature of what it means; ie experimentation, and correcting failure.

so the sigil firing didn't work? ask yourself the question "why not?"
your subconcious will bubble up an answer which will be correct even if it doesn't make logical sense.
if you are having difficulty with listening to yourself then try astrally looking into a mirror and asking your reflection the question.

many magicians can make the mistake of waging war with thier universe, the language we use to describe our art 'firing' and such leads some to believe that it is a struggle. nothing comes of struggling except failure. magic should be easy, effortless, flowing. just LET it happen. it wants to happen, it is happening, can you feel it? happening right now?